ETC FS98O22

FS98O22-DS-14_EN
JUL 2011
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REV. 1.4
Datasheet
FS98O22
8-bit MCU with 4k program EPROM, 256-byte RAM,
1 low noise OPAMP, 8-ch 14-bit ADC,
4 × 20 LCD driver and RTC
FS98O22
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Fortune Semiconductor Corporation
富晶電子股份有限公司
28F,No.27, Sec. 2, Zhongzheng E. Rd.,
Danshui Dist, New Taipei City 251, Taiwan
Tel.：886-2-28094742
Fax：886-2-28094874
www.ic-fortune.com
This manual contains new product information. Fortune Semiconductor Corporation reserves the rights to
modify the product specification without further notice. No liability is assumed by Fortune Semiconductor
Corporation as a result of the use of this product. No rights under any patent accompany the sale of the
product.
Rev. 1.4
2/146
FS98O22
Contents
DEVICE OVERVIEW ................................................................................................................................................... 10
1.1
High Performance RISC CPU ..................................................................................................... 10
1.2
Peripheral Features..................................................................................................................... 10
1.3
Analog Features .......................................................................................................................... 10
1.4
Special Microcontroller Features ............................................................................................... 10
1.5
CMOS Technology ...................................................................................................................... 10
1.6
Applications................................................................................................................................. 11
1.7
Ordering Information .................................................................................................................. 11
1.8
Pin Configuration ........................................................................................................................ 12
1.9
Pin Description ............................................................................................................................ 13
1.10
Functional Block Diagram .......................................................................................................... 14
1.11
CPU Core ..................................................................................................................................... 16
1.12
Clocking Scheme/Instruction Cycle .......................................................................................... 18
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1.
2.
ELECTRICAL CHARACTERISTICS ........................................................................................................................... 19
2.1
Absolute Maximum Ratings ....................................................................................................... 19
2.2
DC Characteristics (VDD=3V, TA=25℃, unless otherwise noted) ............................................ 19
2.3
ADC Characteristics (VDD=3V, TA=25℃, unless otherwise noted) ......................................... 20
2.4
OPAMP Characteristics (VDD=3V, TA=25℃, unless otherwise noted) .................................... 20
2.5 Temperature Characteristics(VDD=3V) ........................................................................................... 20
3.
MEMORY ORGANIZATION ......................................................................................................................................... 21
3.1
Program Memory Structure ........................................................................................................ 21
3.2
Data Memory Structure ............................................................................................................... 21
3.3
System Special Registers........................................................................................................... 22
3.3.1
3.3.2
3.3.3
3.3.4
3.4
4.
Special Register Contents after External Reset (Power On Reset) and WDT Reset . 22
IND and FSR Registers ................................................................................................... 23
STATUS Register ............................................................................................................. 24
INTE and INTF registers.................................................................................................. 25
Peripheral Special Registers ...................................................................................................... 27
POWER SYSTEM ....................................................................................................................................................... 29
4.1
Voltage Doubler ........................................................................................................................... 33
4.2
Voltage Regulator ........................................................................................................................ 35
4.3
Analog Bias Circuit ..................................................................................................................... 36
4.4
Analog Common Voltage Generator .......................................................................................... 37
4.5
Low Battery Comparator ............................................................................................................ 38
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FS98O22
4.6
CLOCK SYSTEM ........................................................................................................................................................ 40
5.1
Oscillator State ............................................................................................................................ 41
5.2
CPU Instruction Cycle ................................................................................................................ 42
5.3
ADC Sample Frequency ............................................................................................................. 43
5.4
Beeper Clock ............................................................................................................................... 44
5.5
Voltage Doubler Operation Frequency ...................................................................................... 45
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5.
Bandgap Voltage and Temperature Sensor .............................................................................. 39
6.
5.6
Chopper Operation Amplifier Input Control Signal .................................................................. 46
5.7
TMCLK -- Timer and LCD Module Input Clock .......................................................................... 47
TIMER MODULE, WATCH DOG TIMER AND PROGRAMMABLE COUNTER ........................................................... 48
6.1
Timer Module ............................................................................................................................... 53
6.1.1
6.1.2
7.
Timer module interrupt ................................................................................................... 54
Using Timer with External/Internal Clock...................................................................... 55
6.2
Watch Dog Timer ......................................................................................................................... 57
6.3
Dual 16-bit Programmable Counter ........................................................................................... 58
I/O PORT..................................................................................................................................................................... 62
7.1
Digital I/O Port with Analog Input Channel Shared: PT1[7:0] .................................................. 75
7.2
Digital I/O Port and External Interrupt Input : PT2[0], PT2[1], PT3[0], PT3[1]......................... 77
7.3
Digital I/O Port or PDM Output : PT2[2] and PT2[5] .................................................................. 79
7.4
Digital I/O Port or I2C Serial Port : PT2[3]/SDA, PT2[4]/SCL .................................................... 80
7.5
Digital I/O Port : PT2[6] ............................................................................................................... 82
7.6
Digital I/O Port or Buzzer Output : PT2[7] ................................................................................. 84
8.
PDM (PULSE DENSITY MODULATOR) MODULE...................................................................................................... 86
9.
I2C MODULE (SLAVE MODE ONLY) .......................................................................................................................... 93
10. ANALOG FUNCTION NETWORK............................................................................................................................. 100
10.1
Analog to Digital Converter (ADC) :......................................................................................... 109
10.2
OPAMP : OP1 ............................................................................................................................. 113
11. ADC APPLICATION GUIDE ...................................................................................................................................... 115
11.1
ADC Output Format .................................................................................................................. 115
11.2
ADC Linear Range..................................................................................................................... 115
11.3
ADC Output Rate and Settling Time ........................................................................................ 115
11.4
ADC Input Offset ....................................................................................................................... 115
11.5
ADC Digital Output .................................................................................................................... 116
11.6
ADC Resolution ......................................................................................................................... 116
12. LOW NOISE OPERATION AMPLIFIER GUIDE......................................................................................................... 117
12.1
Single End Amplifier Application ............................................................................................. 117
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FS98O22
12.2
Differential Amplifier ................................................................................................................. 118
13. LCD DRIVER............................................................................................................................................................. 119
14. HALT AND SLEEP MODES ...................................................................................................................................... 131
15. INSTRUCTION SET .................................................................................................................................................. 132
15.1
Instruction Set Summary.......................................................................................................... 132
15.2
Instruction Description ............................................................................................................. 134
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16. PACKAGE INFORMATION ....................................................................................................................................... 145
16.1
Package Outline ........................................................................................................................ 145
16.2
Package Outline(3.2mm QFP100) ............................................................................................ 146
17. REVISION HISTORY ................................................................................................................................................. 146
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FS98O22
Figure List
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Figure 1-1 FS98O22 pin configuration ......................................................................................... 12
Figure 1-2 FS98O22 function block .............................................................................................. 14
Figure 1-3 FS98O22 CPU core function block ............................................................................. 16
Figure 1-4 FS98O22 instruction cycle .......................................................................................... 18
Figure 2-1 VDDA vs Temp @ VDD=3V
Figure 2-2 VREF vs Temp @ VDD=3V....................... 20
Figure 2-3 LVR vs Temp @ VDD=3V ............................................................................................. 20
Figure 3-1 FS98O22 program memory structure ......................................................................... 21
Figure 3-2 IND & FSR function description .................................................................................. 23
Figure 4-1 FS98O22 power system block .................................................................................... 29
Figure 4-2 Voltage Doubler ............................................................................................................ 33
Figure 4-3 Voltage regulator .......................................................................................................... 35
Figure 4-4 analog bias circuit ....................................................................................................... 36
Figure 4-5 analog common voltage generator ............................................................................. 37
Figure 4-6 low battery comparator function block ...................................................................... 38
Figure 4-7 Bandgap voltage and temperature sensor function block ....................................... 39
Figure 5-1 FS98O22 clock system function block ....................................................................... 40
Figure 5-2 FS98O22 oscillator state block ................................................................................... 41
Figure 6-1 FS98O22 timer module function block ....................................................................... 53
Figure 6-2 watch dog timer function block .................................................................................. 57
Figure 6-3 Programmable Counter Working block diagram ....................................................... 58
Figure 6-4 Programmable Counter Counter mode ...................................................................... 59
Figure 6-5 Programmable Counter Pulse Width Measurement mode ....................................... 60
Figure 6-6 Programmable Counter Frequency Measurement mode.......................................... 61
Figure 7-1 PT1[7:0] function block ............................................................................................... 75
Figure 7-2 PT2[0] PT2[1] PT3[0] PT3[1] function block ............................................................... 77
Figure 7-3 PT2[2] function block................................................................................................... 79
Figure 7-4 PT2[3] PT2[4] function block ....................................................................................... 80
Figure 7-5 PT2[6] function block................................................................................................... 82
Figure 7-6 PT2[7] function block................................................................................................... 84
Figure 8-1 FS98O22 PDM module function block........................................................................ 86
Figure 8-2 PDM module signal generation ................................................................................... 87
Figure 9-1 FS98O22 I2C module communication ........................................................................ 93
Figure 9-2 I2C module function block .......................................................................................... 94
Figure 9-3 I2C waveform for reception ......................................................................................... 98
Figure 9-4 I2C waveforms for transmission ................................................................................. 99
Figure 10-1 FS98O22 analog function network ......................................................................... 100
Figure 10-2 FS98O22 ADC function block.................................................................................. 109
Figure 12-1 single end amplifier application example ............................................................... 117
Figure 12-2 differential amplifier example .................................................................................. 118
Figure 13-1 LCD driver control block .......................................................................................... 119
Figure 13-2 LCD control mode ..................................................................................................... 119
Figure 13-3 LCD duty mode working cycle ................................................................................ 121
Figure 13-4 1/3 bias LCD power system circuit connection example...................................... 122
Figure 13-5 1/3 bias LCD power system clock .......................................................................... 122
Figure 13-6 1/2 bias LCD power system circuit connection example...................................... 123
Figure 13-7 1/2 bias LCD power system clock .......................................................................... 123
Figure 16-1 FS98O22 package outline ........................................................................................ 145
Figure 16-2 FS98O22 3.2mm QFP100 package outline ............................................................. 146
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FS98O22
Table List
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Table 1-1 Ordering Information ...................................................................................................... 11
Table 1-2 FS98O22 pin description ............................................................................................... 13
Table 1-3 FS98O22 main function description table.................................................................... 15
Table 1-4 FS98O22 CPU core block diagram description table .................................................. 17
Table 2-1 FS98O22 absolute maximum rating table .................................................................... 19
Table 2-2 FS98O22 DC characteristics ......................................................................................... 19
Table 2-3 FS98O22 ADC characteristics ....................................................................................... 20
Table 2-4 FS98O22 OPAMP characteristics ................................................................................. 20
Table 3-1 FS98O22 Data memory structure ................................................................................. 21
Table 3-2 system register table ..................................................................................................... 22
Table 3-3 special register reset table ............................................................................................ 22
Table 3-4 peripheral special registers table ................................................................................. 27
Table 4-1 FS98O22 power system register table ......................................................................... 30
Table 4-2 Voltage Doubler register table ...................................................................................... 33
Table 4-3 Voltage Doubler operation frequency selection table ................................................. 34
Table 4-4 voltage regulator register table .................................................................................... 35
Table 4-5 analog bias circuit register table .................................................................................. 36
Table 4-6 analog common voltage generator register table ....................................................... 37
Table 4-7 low battery comparator register table .......................................................................... 38
Table 4-8 low battery comparator voltage detection selection table ......................................... 38
Table 4-9 bandgap voltage and temperature sensor register table ........................................... 39
Table 5-1 FS98O22 clock system register table ........................................................................... 40
Table 5-2 FS98O22 clock system register table ........................................................................... 41
Table 5-3 MCK selection table ....................................................................................................... 41
Table 5-4 CLK selection table ........................................................................................................ 41
Table 5-5 oscillator state selection table ...................................................................................... 42
Table 5-6 FS98O22 CPU instruction cycle register table ............................................................ 42
Table 5-7 MCK selection table ....................................................................................................... 42
Table 5-8 instruction cycle selection table ................................................................................... 42
Table 5-9 ADC sample frequency selection table ........................................................................ 43
Table 5-10 beeper clock register table.......................................................................................... 44
Table 5-11 MCK selection table ..................................................................................................... 44
Table 5-12 CLK selection table ...................................................................................................... 44
Table 5-13 beeper clock selection table ....................................................................................... 44
Table 5-14 register and the beeper clock selection table ........................................................... 45
Table 5-15 MCK selection table ..................................................................................................... 45
Table 5-16 Voltage Doubler operation frequency selection table ............................................... 45
Table 5-17 CLK selection table ...................................................................................................... 46
Table 5-18 MCK selection table ..................................................................................................... 46
Table 5-19 chopper control signal selection table ...................................................................... 46
Table 5-20 TMCLK selection table................................................................................................. 47
Table 6-1 Timer module and watch dog timer register table ...................................................... 48
Table 6-2 timer module interrupt register table ........................................................................... 54
Table 6-3 timer selection table ...................................................................................................... 54
Table 6-4 external timer setup register table ............................................................................... 55
Table 6-5 CLK selection table ........................................................................................................ 55
Table 6-6 MCK selection table ....................................................................................................... 55
Table 6-7 TMCLK selection table .................................................................................................. 55
Table 6-8 registers and timer selection table ............................................................................... 56
Table 6-9 watch dog timer register table ...................................................................................... 57
Table 6-10 Programmable Counter working mode selection table ............................................ 58
Table 6-11 Programmable Counter Clock signal selection table ............................................... 59
Table 7-1 FS98O22 I/O port register table .................................................................................... 62
Table 7-2 PT1 register table ........................................................................................................... 76
Table 7-3 PT2 register table ........................................................................................................... 78
Table 7-4 PT2 register table ........................................................................................................... 80
Table 7-5 PT2 register table ........................................................................................................... 81
Table 7-6 PT2 register table ........................................................................................................... 83
Table 7-7 PT2[7] register table ...................................................................................................... 85
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FS98O22
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Table 8-1 PDM module register table ............................................................................................ 88
Table 8-2 PMD register table ......................................................................................................... 92
Table 8-3 PDM CLK selection table ............................................................................................... 92
Table 9-1 I2C module register table .............................................................................................. 95
Table 9-2 I2C register table ............................................................................................................ 98
Table 10-1 analog function network register table .................................................................... 101
Table 10-2 ADC function register table ........................................................................................ 110
Table 10-3 FTIN selection table .................................................................................................... 110
Table 10-4 FTB selection table ..................................................................................................... 110
Table 10-5 INH selection table ...................................................................................................... 111
Table 10-6 INL selection table ...................................................................................................... 111
Table 10-7 ADG selection table .................................................................................................... 111
Table 10-8 VRH selection table .................................................................................................... 111
Table 10-9 SVRL selection table................................................................................................... 112
Table 10-10 ADC output rate selection table ............................................................................... 112
Table 10-11 ADC sample frequency selection table ................................................................... 112
Table 10-12 FS98O22 OPAMP register table ............................................................................... 113
Table 10-13 OP1P selection table................................................................................................. 113
Table 10-14 OP1N selection table ................................................................................................ 113
Table 10-15 chopper mode selection table ................................................................................. 114
Table 11-1 ADC rolling counts versus ADM ................................................................................ 116
Table 11-2 ADC rolling counts versus VR ................................................................................... 116
Table 13-1 LCD frame frequency selection table ....................................................................... 120
Table 13-2 LCD duty selection table ........................................................................................... 120
Table 13-3 FS98O22 LCD driver register table ........................................................................... 124
Table 13-4 LCD driver register table ........................................................................................... 129
Table 13-5 CLK selection table .................................................................................................... 129
Table 13-6 MCK selection table ................................................................................................... 129
Table 13-7 TMCLK selection table............................................................................................... 129
Table 13-8 LCD frame frequency selection table ....................................................................... 130
Table 13-9 LCD duty control mode selection table.................................................................... 130
Table 15-1 FS98O22 instruction set table................................................................................... 132
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FS98O22
Register List
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Register STATUS at address 04H ................................................................................................. 24
Register INTE at address 07H ....................................................................................................... 25
Register INTF at address 06H ....................................................................................................... 26
Register PCK at address 15H ........................................................................................................ 30
Register NETE at address 1CH ..................................................................................................... 31
Register NETF at address 1DH ..................................................................................................... 32
Register SVD at address 1FH ........................................................................................................ 32
Register CTAH at address 08H...................................................................................................... 48
Register CTAL at address 09H ...................................................................................................... 48
Register CTBH at address 0AH ..................................................................................................... 49
Register CTBL at address 0BH ..................................................................................................... 49
Register CTCON at address 0CH .................................................................................................. 50
Register WDTCON at address 0DH............................................................................................... 51
Register TMOUT at address 0EH .................................................................................................. 52
Register TMCON at address 0FH .................................................................................................. 52
Register PT1 at address 20H ......................................................................................................... 63
Register PT1EN at address 21H .................................................................................................... 63
Register PT1PU at address 22H .................................................................................................... 63
Register AIENB1 at address 23H .................................................................................................. 65
Register PT2 at address 24H ......................................................................................................... 66
Register PT2EN at address 25H .................................................................................................... 67
Register PT2PU at address 26H .................................................................................................... 68
Register PT2MR at address 27H ................................................................................................... 69
Register PT3 at address 28H ......................................................................................................... 70
Register PT3EN at address 29H .................................................................................................... 71
Register PT3PU at address 2AH ................................................................................................... 72
Register PT3MR at address 2BH................................................................................................... 73
Register PT2OCB at address 37H ................................................................................................. 74
Register PT2MR at address 27H ................................................................................................... 88
Register PMD1H at address 30H ................................................................................................... 89
Register PMD1L at address 31H ................................................................................................... 89
Register PMD2H at address 30H ................................................................................................... 90
Register PMD2L at address 31H ................................................................................................... 90
Register PMCON at address 36H .................................................................................................. 91
Register I2CCON at address 57H .................................................................................................. 95
Register I2CSTA at address 58H ................................................................................................... 96
Register I2CADD at address 59H .................................................................................................. 96
Register I2CBUF at address 5AH .................................................................................................. 97
Register ADOH at address 10H ................................................................................................... 102
Register ADOL at address 11H ................................................................................................... 102
Register ADOLL at address 12H ................................................................................................. 103
Register ADCON at address 13H ................................................................................................ 103
Register PCK at address 15H ...................................................................................................... 104
Register NETA at address 18H .................................................................................................... 105
Register NETB at address 19H ................................................................................................... 106
Register NETC at address 1AH ................................................................................................... 107
Register NETD at address 1BH ................................................................................................... 108
Register LCD1 at address 40H .................................................................................................... 124
Register LCD2 at address 41H .................................................................................................... 125
Register LCD3 at address 42H .................................................................................................... 125
Register LCD4 at address 43H .................................................................................................... 126
Register LCD5 at address 44H .................................................................................................... 126
Register LCD6 at address 45H .................................................................................................... 127
Register LCDENR at address 54H .............................................................................................. 128
Rev. 1.4
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FS98O22
1.
Device Overview
The FS98O22 is a CMOS 8-bit single chip microcontroller(MCU) with embedded a 4kx16 bits one-time
programmable (OTP) ROM, a 8-channel 14-bit fully differential input analog to digital converter, low noise
amplifier, and 4 x 20 LCD driver.
The FS98O22 is best suited for applications such as electrical scale, meter, and sensor or transducer
measurement application etc.
1.1.
8-bit single chip microcontroller(MCU).
Embedded 4k x 16 bits program memory with one-time programmable (OTP) ROM.
256-byte data memory (SRAM).
Only 37 single word instructions to learn
8-level memory stacks.
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




High Performance RISC CPU
1.2.







1.3.


1.4.









1.5.


Peripheral Features
16-bit bi-directional I/O port.
PDM (Pulse Density Modulator) output.
Buzzer output.
I2C serial I/O port (slave mode only).
4 x 20 LCD drivers.
One 8-channel 14-bit fully differential input analog to digital converter(ADC)
One low noise amplifier
Analog Features
8-channel Sigma-Delta ADC with programmable output rate and resolution.
Low noise (1μV Vpp without chopper, 0.5μV Vpp with chopper, 0.1Hz~1Hz) OPAMP with chopper
controller.
Special Microcontroller Features
External 32768Hz crystal oscillator (RTC).
Embedded Low Voltage Reset (LVR) and Low Voltage Detector (LVD).
Embedded charge pump (Voltage Doubler) and voltage regulator (3.6V regulated output).
Embedded bandgap voltage reference (typical 1.16V±50mV, 100ppm/°C).
8 Interrupt sources (external: 5, internal: 3).
Internal silicon temperature sensor.
Watchdog timer (WDT).
Embedded 1.0 MHz oscillator.
Package: 73-pin dice form, 100-pin LQFP.
CMOS Technology
Voltage operation ranges from 2.2V to 3.6V.
Operation current is less than 4 mA; sleep mode current is about 3μA.
Rev. 1.4
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FS98O22
1.6.



1.7.
Applications
Sensor or transducer measurement applications.
Electronic kitchen scale, personal scale.
Digital meter.
Ordering Information
Table 1-1 Ordering Information
Description
Package Type
MCU with OTP ROM; The customer has to 73-pin Dice form, 100-pin LQFP
program the compiled hex code into OTP ROM.
MCU with program type; FSC programs the 73-pin Dice form, 100-pin LQFP
customer‟s compiled hex code into OTP ROM at
factory before shipping.
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Product Number
FS98O22
FS98O22-nnnV
Note1: Code number (nnnV) is assigned for customer.
Note2: Code number (nnn = 001~999); Version (V = A~Z).
Rev. 1.4
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FS98O22
Pin Configuration
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1.8.
Figure 1-1 FS98O22 pin configuration
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FS98O22
1.9.
Pin Description
Table 1-2 FS98O22 pin description
In/Out
P
I/O
O
I/O
I
I/O
I/O
Pin No
5
7
8
9, 10
11
12
13~20
21~22
39~40
23,36
24
25
38
41
42
37
43~46
51~70
71~74
83
84
85~87
88
89
90
91
92
93
94
95
96
97
98
99
100
-
Description
Programming Power Supply
OPAMP 1 Output
Band gap Reference Output
ADC Pre-Filter Capacitor Connection
Analog Circuit Bias Current Input
Analog Ground
Digital I/O Port or Analog input channel
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Name
VPP
OP1O
REFO
FTB, FTC
VB
AGND
PT1<0~7>/AIN0~7
PT2<0~1>/INT0~1,
PT3<0~1>/INT2~3
PT2<2,5>/PDM1,2
PT2<3>/SDA
PT2<4>/SCL
PT2<7>/BZ
PT3<2>/PFI
PT3<3>/PFO
PT2<6>,
PT3<4~7>
SEG20~SEG1
COM4~COM1
LCA
LCB
V3,V2,V1
VDDA
VS
VGG
VSSP
CB
CA
VDDP
VDD
VSS
XOUT
XIN
TST
RST
NC
Rev. 1.4
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
I/O
I/O
P
P
P
P
P
I/O
I/O
P
P
P
O
I
I
I
-
Digital I/O Port and External Interrupt input
Digital I/O Port or PDM output
Digital I/O Port or I2C serial Bi-Directional data line
Digital I/O Port or I2C clock input
Digital I/O Port or Buzzer Output
Digital I/O Port or Programmable Frequency Input
Digital I/O Port or Programmable Frequency Output
Digital I/O Port
LCD Segment Driver Output
LCD Common Driver Output
LCD Charge Pump Capacitor Positive Connection
LCD Charge Pump Capacitor Negative Connection
LCD Bias
Analog Power Output
Voltage Source from VDDA
Charge Pump Voltage
Charge Pump Negative Power Supply
Charge Pump Capacitor Negative Connection
Charge Pump Capacitor Positive Connection
Charge Pump Positive Power Supply
Positive Power Supply
Negative Power Supply (Ground)
32768Hz Oscillator Output
32768Hz Oscillator Input
Testing Mode
CPU Reset
No Connection
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1.10. Functional Block Diagram
Figure 1-2 FS98O22 function block
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FS98O22
There are 5 kinds of functional blocks in the Function Block Diagram, described as table 1-3:
Table 1-3 FS98O22 main function description table
Item
CPU Kernel
Sub Item
FS98O22 CPU Core
OTP Program Memory
Data Memory
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Clock sys
Description
Please refer to Chapter 1.11 for detailed description
OTP: One Time Programmable
8k bytes is used for 4k line programming instructions
FS98O22 has 256 bytes SRAM embedded in it.
(128 bytes registers, 256 general data memory)
There are two clock sources in FS98O22. One is the
internal clock which generates 1M HZ for CPU works,
and the other is an external one which provide 32768
HZ clock signal to the chip.
Clock Counter for Time out interrupt and Watch dog
Timer
Embedded 4 X 20 LCD driver
Embedded Serial Port for Communication, It support
I2C protocol which is designed by Philips
Similar to PWM function
User should connect a Buzzer to the embedded buzzer
port to receive the warning or reminding signal.
FS98O22 embeds Dual 16-bit Programmable Counter
which could be used to do three kinds of processes:
Counter, Pulse Width Measurement and Frequency
Measurement.
FS98O22 support 2 External Interrupt port
An embedded Sigma-Delta Analog to Digital Converter
which converts the analog signal of the sensor to a
digital number.
FS98O22 has an embedded low noise OP amplifier for
pre-processing the signal, which is connected to the
ADC to get a better A/D resolution or amplify the signal
to fit the ADC Input range.
FS98O22 has a special power system. The power
system can supply a fixed voltage for CPU and ADC.
The input voltage of the chip can be within a certain
range and floating.
The PT1 port has 8 bits. User can define these 8 bits
for general purpose or special assignment as ADC
input.
The PT2 port has 8 bits. User can define these 8 bits
for general purpose or some special function as
External Interrupt, I2C, PDM and the Buzzer.
Digital Function
Timer Module
LCD Module
I2C
PDM
Buzzer
Programmable Counter
Analog Function
Ext. INT
ADC
OP Amplifier
Power Function
Power Module
General Purpose I/O
PT1
PT2
Rev. 1.4
15/146
FS98O22
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1.11. CPU Core
Figure 1-3 FS98O22 CPU core function block
The “CPU Core Block Diagram” shown in Section 1.11 mainly includes 7 important registers and 2
memory units. Please see the Figure 1-3 and the Table 1-4 for detailed information.
Rev. 1.4
16/146
FS98O22
Table 1-4 FS98O22 CPU core block diagram description table
Sub Items
Program Counter
Description
This Register plays an important role in all the CPU working
cycle. It records the pointer of the instruction that the CPU
processes every cycle in the Program Memory. In a general
CPU cycle, Program Counter pushes the Program Memory
Address (12bits), instruction pointer, into the Program Memory
and then increments for the next cycle.
Stack Register
Stack Register is used for recording the program return
instruction pointer. When the program calls function, Program
Counter will push the instruction pointer into the Stack
Register. After finish this function, Stack Register pushes the
instruction pointer back to the Program Counter to resume the
original program process.
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Items
Registers
Instruction Register
After Program Counter pushes the instruction pointer
(Program Memory Address) into the Program Memory,
Program Memory pushes the Program Memory Data (16bits),
instruction, into Instruction Register for reference.
FS98O22 instruction has 16 bits, and contains 3 kinds of
information as Direct Address, Direct Data and Control
Information.
CPU could push the Direct Data into Work Register or do
some process for the register stored in the Data Memory
pointed by the Direct Address by Control Information.



Instruction Decoder
Instruction Register pushes the Control Information to the
Instruction Decoder to decode and then sends the decoded
information to related registers.
File Select Register
In FS98O22 Instruction Sets, FSR (File Select Register) is
used for indirect data process. User could fill the FSR with the
Data Memory Address of some register, and then process this
register by IND Register. CPU will fill the IND Register with the
data address in the Data Memory as FSR.
Work Register
Work Register is used for buffering the data which is stored in
some memory address of Data Memory.
While CPU processes some register data by ALU, the following
status may change as follows: PD, TO, DC, C and Z. Please
refer to Section 3.3.2 for detailed introduction.
Status Register
Memory
Program Memory
Data Memory
Rev. 1.4
Direct Address (8bits)
It is the Data Memory Address. CPU can use this
address to process the Data Memory.
Direct Data (8bits)
It is the value which CPU used for processing Work
Register by the ALU (arithmetic and logic unit).
Control Information
It records the information for the ALU to process.
FS98O22 has an embedded 4k bytes OTP (One Time
Programmable) ROM as Program Memory. Because the
OPCODE of the instruction is 16 bits, user could program 4k
instructions in FS98O22 at most.
Program Memory Address Bus is 12 bits, and the Data Bus is
16bits.
FS98O22 has an embedded 256 bytes SRAM as Data Memory.
The Data Memory Address Bus is 8 bits, and Data Bus is 8 bits.
17/146
FS98O22
1.12. Clocking Scheme/Instruction Cycle
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One Instruction cycle (CPU cycle) includes 4 steps and the CPU could process 2 steps per CPU Clock. Users
can setup the MCK Register to decide the step timing. Please refer to Chapter 5 for related information. For
Example, if the MCK Register is filled with 0x04h (MCK = ICK, Instruction Cycle = MCK / 2, ICK = 1MHZ), the
step timing is 500k HZ, and one instruction cycle needs 4us (2 x 1/500k sec) to complete. The 4 steps are
described as follows. Please refer to the CPU core (Section 1.11) to understand these 4 steps.
1.
Fetch
Program Counter pushes the Instruction Pointer into Program Memory, and the pointed Data in the
Program Memory is stored in the Instruction Register.
2.
Decode
The Instruction Register pushes the Direct Address to Address MUX, or pushes the Direct Data to Data
MUX, and pushes the Control Information into Instruction Decoder to decode the OPCODE.
3.
Execute
ALU executes the process based on the decoded Control Information.
4.
Write Back
Push the ALU result to Work Register or Assigned Data Memory Address.
Because one OPCODE can only have either Direct Address or Direct Data, sometimes user needs 2
instructions to complete one simple job. For example, if user want to fill Data Memory address 0x55h with data
0xFFh, user needs to process 【movlw 0xFFh】 to filled Work Register with 0xFFh, and then process 【movwf
0x55h】to fill Data Memory 0x55h with Work Register content. For the same reason, CPU needs 2 instruction
cycles to complete some kinds of instructions such as call, goto…etc. Please see the Figure 1-4.
Figure 1-4 FS98O22 instruction cycle
Rev. 1.4
18/146
FS98O22
2.
Electrical Characteristics
2.1.
Absolute Maximum Ratings
Table 2-1 FS98O22 absolute maximum rating table
Unit
V
V
C
C
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Parameter
Rating
Supply Voltage on VDD
3.6
Input Voltage on any pin
-0.3 to VDD+0.3
Ambient Operating Temperature
-40* to +85
Storage Temperature
-55 to +150
Soldering Temperature, Time
260C, 10 Sec
* FS98O22 passed -40C LTOL (Low Temperature Operating Life) test (VDD=3V)
2.2.
DC Characteristics (VDD=3V, TA=25℃, unless otherwise noted)
Table 2-2 FS98O22 DC characteristics
Symbol
Parameter
VDD
Operation Power Voltage
IDD1
IDD2
IPO
VIH
VIL
VIHSH
VIHSL
IPU
IOH
IOL
VDDA
IREG
Min
2.2
MCK=1MHz,
CPUCLK=MCK/2, Charge
Pump, ADC,OPAMP ON
Internal Oscillator Off,
Supply Current 2
MCK=32768Hz
LCD ON.
Sleep Mode Supply Current Sleep Instruction
Digital Input High Voltage PT1, Reset
0.7
Digital Input Low Voltage
PT1, Reset
Schmitt-trigger port
Input Hys. High Voltage
Schmitt-trigger port
Input Hys. Low Voltage
Pull up Current
Vin=0
High Level Output Current VOH=VDD-0.3 V
Low Level Output Current VOL=0.3 V
Analog Power
VDD=3V
VDDA Regulator Output
Internal Voltage Double
Current
VDDA=0.95*VDDA(unload)
Supply Current 1
VCVDD
VDDA Voltage Coefficient
A
AGND Analog Ground Voltage
VREF
Build in Reference Voltage
Build in Reference Voltage
TCREF
Temperature Coefficient
Low Battery Detection
VLBAT
Voltage
VSR
VS Switch Resistor
FRC
Internal RC oscillator
FWDT Internal WDT Clock
Rev. 1.4
Test Conditions
Typ
Max
3.6
4
8
mA
15
3
0.45
0.20
20
7
5
3.5
0.3
6
-2
Unit
V
μA
μA
VDD
VDD
VDD
VDD
μA
mA
mA
V
mA
2
%/V
VDDA/2
1.18
V
V
Ta=-40~80℃
100
ppm/℃
S_LB [1:0]=00
S_LB [1:0]=01
2.3
3.5
10
1.0
2.1
To AGND
0.7
V
1.3
Ω
MHz
KHz
19/146
FS98O22
2.3.
ADC Characteristics (VDD=3V, TA=25℃, unless otherwise noted)
Table 2-3 FS98O22 ADC characteristics
Symbol
Parameter
ADC Common Mode Input Range
VADIN
ADC Differential Mode Input Range
Resolution
ADC Linearity Error
ADC Input Offset Voltage
With Zero Cancellation
VRFIN=0.44V
VRFIN=0.44V
VAIN=0
-0.1
Typ.
Max.
Unit
0
2.3
V
15625
0
0.6
1
31250
+0.1
V
Counts
mV
0
V
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VACIN
Test Conditions
Min.
INH,INL,VRH,VRL to
0.6
VSS
(INH,INL), (VRH,VRL)
2.4.
OPAMP Characteristics (VDD=3V, TA=25℃, unless otherwise noted)
Table 2-4 FS98O22 OPAMP characteristics
Test Conditions
Min.
Typ.
1.5
20
1.0
0.5
10
100
Rs<100
Rs=100 , 0.1Hz~1Hz
Rs=100 , 0.1Hz~1Hz
0.5
0.5
S_CHCK[1:0]=11
Temperature Characteristics(VDD=3V)
Max.
Unit
mV
V
Vpp
Vpp
pA
pA
V
V
Hz
pF
30
300
2.4
2.4
1k
50
100
V
2.5.
Parameter
Input Offset
Input Offset Voltage with Chopper
Input Reference Noise
Input Reference Noise with Chopper
Input Bias Current
Input Bias Current with Chopper
Input Common Mode Range
Output Voltage Range
Chopper Clock Frequency
Capacitor Load
)
Symbol
VDDA Temperature Coefficient(Average)
R
E
F
T
e
m
p
e
r
a
t
u
r
e
C
(
V
F
1
.
2
2
5
0
E
3.7200
1
.
2
2
0
0
1
.
2
1
5
0
1
.
2
1
0
0
3.6200
1
.
2
0
5
0
3.6000
1
.
2
0
0
0
1
.
9
5
0
3.6800
R
3.6600
3.6400
V
VDDA(V)
3.7000
3.5800
-50 -40 -30 -20 -10
0
10
20
30
40
50
60
70
80
90 100 110 120 130 140 150
Temperature (Deg)
-
-
1
5 - 4 - 0 3 -0 2 0 1 10
0
20
0
30
T
Figure 2-1 VDDA vs Temp @ VDD=3V
40
50
e
60
m
70
80
p
90
100 110 120 130 140 150
e
r
a
t
u
Figure 2-2 VREF vs Temp @ VDD=3V
LVR Temperature Coefficient(Average)
2.75
LVR(V)
2.50
2.25
2.00
1.75
1.50
1
2
3
4
5
6
7
8
9
10
Temperature(Deg)
Figure 2-3 LVR vs Temp @ VDD=3V
1
Use ADOH, ADOL and ADOLL (Extra ADC output register) three register (24 bits ADC output)
Rev. 1.4
20/146
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FS98O22
3.
3.1.
Memory Organization
Program Memory Structure
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FS98O22 has an 12bits Program Counter which is capable of addressing a 4k x 16bits program memory space
and a 8 level depth 12bits Stack Register. The Start up/Reset Vector is at 0x0000H. When FS98O22 is started
or its program is reset, the Program Counter will point to Reset Vector. The Interrupt Vector is at 0x0004H. No
matter what ISR is processed, the Program Counter will point to Interrupt Vector. Please see Figure 3-1.
Figure 3-1 FS98O22 program memory structure
3.2.
Data Memory Structure
FS98O22 has 384-byte Data Memory. The data memory is partitioned into three parts. The area with address
00h~07h is reserved for system special registers, such as indirect address, indirect address pointer, status
register, working register, interrupt flag, interrupt control register. The address 08h~7Fh areas are peripheral
special registers, such as I/O ports, timer, ADC, signal conditional network control register, LCD driver. The
address 80h~17Fh areas are SRAM for general data memory. Please see Table 3-1.
Table 3-1 FS98O22 Data memory structure
Rev. 1.4
Start Address
End Address
Data Memory
0X00H
0X07H
System Special Registers
0X08H
0X7FH
Peripheral Special Registers
0X80H
0X17FH
General Data Memory(256 bytes)
21/146
FS98O22
3.3.
System Special Registers
The System Special Registers are designed to complete CPU Core functions, and consists of indirect address,
indirect address pointer, status register, work register, interrupt flag, and interrupt control register. Please see
Section 1.11 for related CPU work flow chart.
Table 3-2 system register table
Address
Name
IND0
IND1
FSR0
FSR1
STATUS
WORK
INTF
07H
INTE
16H
17H
INTF2
INTE2
3.427
3.4.1
1.11/3.4.1
1.11/3.4.1
1.11/3.4.2
1.11
Value on
Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Power on
2
Reset
Use contents of FSR0 to address data memory
uuuuuuuu
Use contents of FSR1 to address data memory
uuuuuuuu
Indirect data memory address pointer 0
uuuuuuuu
Indirect data memory address pointer 1
uuuuuuuu
IRP1
IRP0
PD TO DC
C
Z 00u00uuu
WORK register
uuuuuuuu
I2CI
00000000
TMIF
ADIF E1IF E0IF
F
I2CI
00000000
GIE
TMIE
ADIE E1IE E0IE
E
CTIF E3IF E2IF 00000000
CTIE E3IE E2IE 00000000
Bit 7
Bit 6
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00H
01H
02H
03H
04H
05H
06H
Referenced
Section
3.3.1.
3/6/7/9/10/11
3/6/7/9/10/11
6/7
6/7
Special Register Contents after External Reset (Power On Reset) and WDT Reset
Table 3-3 special register reset table
Register
Address
04H
0DH
20H
21H
22H
23H
24H
25H
26H
27H
28H
29H
2AH
2BH
37H
57H
58H
59H
5AH
2
Register Content
Register
Name External Reset
WDT Reset
STATUS
00u00uuu
uuuu1uuu
WDTCON
00000000
uuuuuuuu
PT1
00000000
uuuuuuuu
PT1EN
00000000
uuuuuuuu
PT1PU
00000000
uuuuuuuu
AIENB1
00000000
uuuuuuuu
PT2
00000000
uuuuuuuu
PT2EN
00000000
uuuuuuuu
PT2PU
00000000
uuuuuuuu
PT2MR
00000000
uuuuuuuu
PT3
00000000
uuuuuuuu
PT3EN
00000000
uuuuuuuu
PT3PU
00000000
uuuuuuuu
PT3MR
00000000
uuuuuuuu
PT2OC
uuu11uuu
uuuuuuuu
I2CCON
0001uuuu
uuuuuuuu
STA
uu0000u0
uuuuuuuu
I2CADD
00000000
uuuuuuuu
I2CBUF
00000000
uuuuuuuu
u mean unknown or unchanged
Rev. 1.4
22/146
FS98O22
3.3.2.
IND and FSR Registers
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The IND (Indirect Addressing) register is not a physical register, but indirect addressing needs the IND register.
Any instruction using the IND register actually accesses the register pointed by the FSR (File Select Register).
While user reads data from the IND register, the CPU gets the data from the Data Memory at the address
stored in FSR. While user writes the data into IND register, CPU actually saves the data into Data Memory at
the address stored in FSR. Please see Figure 3-2.
Figure 3-2 IND & FSR function description
Rev. 1.4
23/146
FS98O22
3.3.3.
STATUS Register
The STATUS register contains the arithmetic status of ALU and the RESET status. The STATUS register is
similar to other registers, and can be the destination for any instruction. If the STATUS register is the
destination for an instruction that affects the Z, DC or C bit, then the writing to these three bits is disabled.
These bits are set or cleared according to the device logic. The TO and PD bits are not writable.
Register STATUS at address 04H
R/W-0
R/W-0
STATUS
IRP1
IRP0
U-X
R-0
R-0
R/W-X
R/W-X
R/W-X
PD
TO
DC
C
Z
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property
Bit7
Bit 7
Bit0
IRP1: Indirect address 1 page select
1 = Indirect address 1 extend memory address is set (Memory 1XXH)
0 = Indirect address 1 extend memory address is Not set (Memory 0XXH)
Bit 6
IRP0: Indirect address 0 page select
1 = Indirect address 0 extend memory address is set (Memory 1XXH)
0 = Indirect address 0 extend memory address is Not set (Memory 0XXH)
Bit 4
PD: Power down Flag.
1 = By execution of SLEEP instruction
0 = After power-on reset
Bit 3
TO: Watch Dog Time Out Flag. Cleared by writing 0 and Set by Watch Dog Time Out
1 = A Watch Dog Timer time-out occurred
0 = After power-on reset
Bit 2
DC: Digit Carry Flag/borrow Flag, for ADDWFI and SUBWFI
(for borrow the polarity is reversed)
th
1 = If there is a carry out from the 4 bit of the result
th
0 = No carry out from the 4 bit of the result
Bit 1
C: Carry Flag/borrow Flag (~Borrow)
(for borrow the polarity is reversed)
1 = If there is a carry out from the Most Significant bit of the result
0 = No carry out from the most significant bit of the result
Bit 0
Z: Zero Flag
1 = The result of an arithmetic or logic operation is zero
0 = The result of an arithmetic or logic operation is NOT zero
Rev. 1.4
24/146
FS98O22
3.3.4.
INTE and INTF registers
The INTE and INTF registers are readable and writable registers, and contain enable and flag bits for interrupt
devices.
Register INTE at address 07H
property
R/W-0
INTE
GIE
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
TMIE
I2CIE
ADIE
E1IE
E0IE
Bit0
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Bit7
Bit 7
GIE: Global Interrupt Enable flag
1 = Enable all unmasked interrupts
0 = Disable all interrupts
Bit 4
TMIE: 8-bit Timer Interrupt Enable flag
1 = Enable Timer interrupt
0 = Disable Timer interrupt
Bit 3
I2CIE: I2C Interface Interrupt Enable flag
1 = Enable I2C interface interrupt
0 = Disable I2C interface interrupt
Bit 2
ADIE: Analog to Digital converter Interrupt Enable flag
1 = Enable analog to digital converter interrupt
0 = Disable analog to digital converter interrupt
Bit 1
E1IE: PT2.1 External Interrupt Enable flag
1 = Enable PT2.1 external interrupt
0 = Disable PT2.1 external interrupt
Bit 0
E0IE: PT2.0 External Interrupt Enable flag
1 = Enable PT2.0 external interrupt
0 = Disable PT2.0 external interrupt
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
25/146
FS98O22
Register INTF at address 06H
property
U-0
U-0
U-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
TMIF
I2CIF
ADIF
E1IF
E0IF
INTF
Bit7
TMIF: 8-bit Timer Interrupt Flag
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Bit 4
Bit0
1 = Timer interrupt occurred (must be cleared in software)
0 = No Timer interrupt
Bit 3
I2CIF: I2C Interface Interrupt Flag
1 = I2C Interface interrupt occurred (must be cleared in software)
0 = No I2C Interface interrupt
Bit 2
ADIF: Analog to digital converter Interrupt Flag
1 = Analog to digital converter Interrupt occurred (must be cleared in software)
0 = No Analog to digital converter Interrupt
Bit 1
E1IF: PT2.1 External Interrupt Flag
1 = PT2.1 External Interrupt occurred (must be cleared in software)
0 = No PT2.1 External Interrupt
Bit 0
E0IF: PT2.0 External Interrupt Flag
1 = PT2.0 External Interrupt occurred (must be cleared in software)
0 = No PT2.0 External Interrupt
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X
= Bit
unknown
is
26/146
FS98O22
3.4.
Peripheral Special Registers
The Peripheral Special Registers are designed for Peripheral functions, such as I/O ports, timer, ADC, signal
conditional network control register, LCD driver. Please see Table 3-4 and the following Chapters for detailed
description of these peripheral functions.
Table 3-4 peripheral special registers table
Address
Referenced
Section
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
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08H
09H
0AH
0BH
Value on
Bit 2 Bit 1 Bit 0 Power on
Reset
CTAH
6.3
CTA[15:8]
uuuuuuuu
CTAL
6.3
CTA[7:0]
uuuuuuuu
CTBH
6.3
CTB[15:8]
uuuuuuuu
CTBL
6.3
CTB[7:0]
uuuuuuuu
FQT
CTCON
6.3
TON
MUXSEL[2:0]
TE
OVAB
0000000u
MB
WDTCON
6.2
WTDTEN
WTS [2:0]
0uuuu000
TMOUT
6.1
TMOUT [7:0]
00000000
TMCON
6.1
TRST
TMEN
INS [2:0]
1uuu0000
ADOH
10/11
ADO [15:8]
00000000
ADOL
10/11
ADO [7:0]
00000000
ADOLL
Extra ADC output register
00000000
ADCON
10/11
ADRST
ADM [2:0]
uuuu0000
MCK
M2_C M1_C M0_ 00000000
5
M7_CK
M6_CK
M5_CK
M3_CK
K
K
CK
PCK
S_CH1CK S_BE S_P 00000000
4/5/7.5/10
ENPUMP
[1:0]
EP CK
NETA
10/11
SINL[1:0]
SINH[2:0]
SFTA[2:0]
00000000
NETB
10/11
SOP1N[1:0]
SVRL[1:0]
SVRH[1:0] 00000000
NETC
ADE
00000000
10/11
SREFO
ADG[1:0]
AZ
N
NETD
10/11
OP1EN
SOP1P[2:0]
00000000
NETE
4/10/11
ENVS
SILB[1:0]
ENLB
00000000
NETF
ENA ENV 00000000
4/10/11
ENBAND ENVDDA
GND B
SVD
LBO uuuuuuuu
4.5
UT
PT1
7
PT1 [7:0]
uuuuuuuu
PT1EN
7
PT1EN [7:0]
00000000
PT1PU
7
PT1PU [7:0]
00000000
AIENB1
7
AIENB[7:6]
AIENB[5:0]
00000000
PT2
7
PT2 [7:0]
uuuuuuuu
PT2EN
7
PT2EN [7:0]
00000000
PT2PU
7
PT2PU [7:0]
00000000
PT2MR
7.2/7.5/8
BZEN
PM2EN
PM1EN
E1M[1:0]
E0M[1:0]
00000000
PT3
PT3 [7:0]
uuuuuuuu
PT3EN
PT3EN [7:0]
00000000
PT3PU
PT3PU [7:0]
00000000
PT3MR
PFOEN
E3M[1:0]
E2M[1:0]
00000000
PMD1H
8
PMD1[15:8]
00000000
PMD1L
8
PMD1[7:0]
00000000
PMD2H
PDMD2[15:8]
00000000
PMD2L
PDMD2[7:0]
00000000
PMCON
8
PDMEN
PMCS[2:0]
00000000
PT2OCB
9
PT2OC[4:3]
uuu11uuu
LCD1
13
SEG2 [3:0]]
SEG1 [3:0]
uuuuuuuu
LCD2
13
SEG4 [3:0]
SEG3 [3:0]
uuuuuuuu
LCD3
13
SEG6 [3:0]
SEG5 [3:0]
uuuuuuuu
LCD4
13
SEG8 [3:0]
SEG7 [3:0]
uuuuuuuu
LCD5
13
SEG10 [3:0]
SEG9 [3:0]
uuuuuuuu
LCD6
13
SEG12 [3:0]
SEG11 [3:0]
uuuuuuuu
LCD7
13
SEG14 [3:0]
SEG13 [3:0]
uuuuuuuu
LCD8
13
SEG16 [3:0]
SEG15 [3:0]
uuuuuuuu
LCD9
13
SEG18 [3:0]
SEG17 [3:0]
uuuuuuuu
Name
0CH
0DH
0EH
0FH
10H
11H
12H
13H
14H
15H
18H
19H
1AH
1BH
1CH
1DH
1FH
20H
21H
22H
23H
24H
25H
26H
27H
28H
29H
2AH
2BH
30H
31H
32H
33H
36H
37H
40H
41H
42H
43H
44H
45H
46H
47H
48H
Rev. 1.4
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FS98O22
Address
Name
Referenced
Section
49H
54H
LCD10
LCDENR
13
57H
58H
59H
5AH
I2CCON
I2CSTA
I2CADD
I2CBUF
9
9
9
9
Bit 6
Bit 5
Bit 4
SEG20 [3:0]
LCDCKS [1:0]
WCOL
I2COV
LCDEN
I2CEN
CKP
DA
P
I2CADD [7:0]
I2CBUF [7:0]
Value on
Bit 2 Bit 1 Bit 0 Power on
Reset
SEG19 [3:0]
uuuuuuuu
LCD_DUTY[ ENP 00000000
LEVEL
1:0]
MPL
0001uuuu
S
RW
BF uu0000u0
00000000
00000000
Bit 3
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13
Bit 7
Rev. 1.4
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FS98O22
4.
Power System
FS98O22 has a special power system that can supply a fixed voltage (3.6V) for CPU and ADC. FS98O22 could
work when the supply voltage is within a specified range, fixed or floating. The power system has 6 function
engines as Voltage Doubler, Voltage Regulator, Analog Bias Circuit, Common Voltage Generator Low
Battery Comparator and Band gap Voltage / Temperature Sensor. Through the first 4 function engines, the
system can generate 3 Voltage level as VGG = 2VDDP, VDDA = 3.6V, AGND = 1.8V. Please see Figure 4-1.
Voltage Doubler
The acceptable VDD range for FS98O22 is from 2.2V to 3.6V. Voltage Doubler raises the voltage of VGG
3
to 2 times of VDDP . VGG is used as the input of Voltage Regulator. It is from 4.4V to 7.2V. Please see
Section 4.1 for detailed register setting.
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1.
2.
Voltage Regulator
The fixed voltage is important when the Analog function is working. Voltage Regulator raises the voltage
of VDDA to fixed 3.6V. Although the input voltage of Voltage Regulator, VGG, is from 4.4V to 7.2V (It
depends on the voltage of VDD), the minimum possible voltage is still higher than 3.6V, so Voltage
Regulator could surely supply VDDA as 3.6V. Please refer to Section 4.2 for detailed register setting.
3.
Analog Bias Circuit
Analog Bias Circuit is used to set VB to 3.6V. VB is used for FS98O22 Analog Function Network. The
user needs to enable Analog Bias Circuit, and then the Analog Functions such as ADC or OPAMP can
work correctly. Please refer to Section 4.3 for detailed register setting.
4.
Common Voltage Generator
FS98O22 sets the analog ground to half VDDA. Please refer to Section 4.4 for detailed register setting.
Figure 4-1 FS98O22 power system block
3
VDDP means the VDD for Charge Pump (Voltage Doubler). User usually connects the VDDP to VDD.
VSSP means the VSS for Charge Pump (Voltage Doubler). User usually connects the VSSP to VSS.
Rev. 1.4
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FS98O22
Table 4-1 FS98O22 power system register table
Address Name
15H
1CH
1DH
1FH
PCK
NETE
NETF
SVD
Referenced
Section
4/5/7.5/10
4/10/11
4/10/11
4.5
Bit 7
Bit 6
Bit 5
ENPUMP
ENBAND
ENVDDA
Bit 4 Bit 3 Bit 2
ENVS
-SILB[1:0]
Bit 1
Bit 0
-S_PCK
ENLB
ENAGND ENVB
LBOUT
Value on
Power on
Reset
00000000
00000000
00000000
uuuuuuuu
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Register PCK at address 15H
property
U-0
R/W-0
U-0
U-0
U-0
ENPUM
P
PCK
U-0
--
U-0
R/W-0
--
S_PCK
Bit7
Bit 6
Bit0
ENPUMP: Voltage Doubler enabled flag
1 = Voltage Doubler is enabled
0 = Voltage Doubler is disabled
Bit 0
S_PCK: Voltage Doubler operation frequency selector
1 = Voltage Doubler Operation Frequency = MCK/100 (Please see Chapter 5)
0 = Voltage Doubler Operation Frequency = MCK/200 (Please see Chapter 5)
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
30/146
FS98O22
Register NETE at address 1CH
property
U-0
U-0
U-0
NETE
R/W-0
R/W-0
ENVS
R/W-0
SILB[1:0]
R/W-0
ENLB
Bit7
Bit0
ENVS: VDDA Voltage Source enable flag (Please read Section 4.2 for detailed description)
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Bit 4
U-0
1 = VDDA is connected to VS. VS could be used as a voltage source.
0 = VDDA and VS are disconnected.
Bit 3-2
SILB[1:0]: Low Battery Comparator Input Selector (Please refer to Section 4.5 for detailed
description)
11 = No definition. The Low Battery Comparator Input is floating.
10 = Low Battery Comparator Input is selected as external analog input AIN4
01 = Low Battery Comparator Input is selected as 3.65V
00 = Low Battery Comparator Input is selected as 2.45V
Bit 1
ENLB: Low Battery Comparator enable flag (Please refer to Section 4.5 for detailed description)
1 = Low Battery Comparator is enabled
0 = Low Battery Comparator is disabled
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
31/146
FS98O22
Register NETF at address 1DH
property
U-0
NETF
R/W-0
R/W-0
ENBAND
ENVDDA
U-0
U-0
U-0
R/W-0
R/W-0
ENAGND
ENVB
Bit7
ENBAND: Band gap Voltage enable flag (Please refer to Section 4.6 for detailed description)
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Bit 6
Bit0
1 = The Band gap Voltage and Temperature Sensor are enabled, REFO to AGND is about 1.16V
0 = The Band gap Voltage and Temperature Sensor are disabled
Bit 5
ENVDDA: Voltage Regulator enable flag (Please refer to Section 4.5 for detailed description)
1 = Voltage Regulator is enabled, VDDA is 3.6V
0 = Voltage Regulator is disabled. VDDA can be from external power supply.
Bit 1
ENAGND: Analog Common Voltage Generator enable flag
(Please see Section 4.4 for detailed description)
1 = Analog Common Voltage Generator is enabled. AGND = 1/2 VDDA
0 = Analog Common Voltage Generator is disabled. AGND is floating.
Bit 0
ENVB: Analog Bias Circuit enable flag (Please see Section 4.3 for detailed description)
1 = Analog Bias Circuit is enabled. Analog system (ADC and OPAMP) can work correctly.
0 = Analog Bias Circuit is disabled. Analog system can NOT work
Register SVD at address 1FH
property
U-X
U-X
U-X
U-X
U-X
U-X
U-X
SVD
LBOUT
Bit7
Bit 0
R-X
Bit0
LBOUT: Low Battery Comparator output (Please refer to Section 4.5 for detailed description)
1 = The Voltage selected by SILB[1:0] is higher than 1.2V.
0 = The Voltage selected by SILB[1:0] is lower than 1.2V
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
32/146
FS98O22
4.1.
Voltage Doubler
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C1 10uF
Figure 4-2 Voltage Doubler
4
Voltage Doubler is used for generating VGG which provide input for VDDA Voltage Regulator. The inputs of
Voltage Doubler are VDDP, VSSP, CA and CB. The related registers are S_PCK and ENPUMP. The Output is
VGG. Please see Figure 4-2.
Table 4-2 Voltage Doubler register table
Address Name
14H
15H
MCK
PCK
Referenced
Section
5
4/5/7.5/10
Bit 7
M7_CK
Bit 6
Bit 5
M6_CK M5_CK
ENPUMP
Bit 4
Bit 3
M3_CK
Bit 2
--
Bit 1
Bit 0
M2_CK M1_CK M0_CK
-S_PCK
Value on
Power on
Reset
00000000
00000000
Operations:
1.
2.
3.
4.
5.
4
5
Connect the pins VDDP and VSSP to VDD (2.2V~3.6V) and VSS (system ground).
Put a 10uF capacitance between CA and CB.
5
Select the Voltage Doubler Operation frequency by setting S_PCK and M0_CK according to the
following table
Set the ENPUMP flag.
The output, VGG, will be 2 times of VDDP.
Please refer to Section 4.2 for detailed description about VDDA and Voltage regulator.
M0_CK is the 1st bit of the MCK register. Please refer to Section 5.0
Rev. 1.4
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FS98O22
Table 4-3 Voltage Doubler operation frequency selection table
M0_CK
S_PCK
Voltage Doubler Operation Frequency
0
0
MCK/200
0
1
MCK/100
1
X
ECK/32
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If the user doesn‟t want the VGG to be generated from the Voltage Doubler, then the ENPUMP should be set to
disable the voltage Doubler, and input the VGG pin a voltage as voltage regulator power supply.
Rev. 1.4
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FS98O22
Voltage Regulator
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4.2.
Figure 4-3 Voltage regulator
Voltage Regulator is used for generating VDDA (3.6V). The input is VGG which is generated by Voltage
Doubler (please see the Section 4.1). The control Register flags are ENVDDA and ENVS. The Outputs are
VDDA and VS. Please see Figure 4-3.
Table 4-4 voltage regulator register table
Address
Name
1CH
1DH
NETE
NETF
Referenced
Section
4/10/11
4/10/11
Bit 7
Value on Power on
Reset
ENVS SILB[1:0]
ENLB
00000000
ENBAND ENVDDA
ENAGND ENVB
00000000
Bit 6
Bit 5
Bit 4 Bit 3 Bit 2
Bit 1
Bit 0
Operations
1.
2.
3.
4.
Operate as Section 4.1 to get the VGG (2 times of VDD or external Power Supply).
Set the ENVDDA flag.
The output, VDDA, is 3.6V.
If the user wants VDDA as output voltage source, then the ENVS flag should be set. VS will be the same
as VDDA.
Rev. 1.4
35/146
FS98O22
Analog Bias Circuit
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4.3.
Figure 4-4 analog bias circuit
Analog Bias Circuit is used to activate VB (reference VDDA) as the power supply voltage for analog circuit
(include ADC, OPAMP, Low Battery Comparator) and LCD driver. The Control register flag is ENVB. Please
see Figure 4-4.
Table 4-5 analog bias circuit register table
Address
Name
Referenced
Section
1DH
NETF
4/10/11
Bit 7
Bit 6
Bit 5
ENBAND
ENVDDA
Bit 4
Bit 3
Bit 2
Value on
Bit 0 Power on
Reset
ENAGND ENVB 00000000
Bit 1
Operation:
1.
2.
3.
4.
Operate as Section 4.1 to get the VGG (2 times of VDD or external Power Supply).
Operate as Section 4.2 to get the VDDA (3.6V).
Set the ENVB flag. The VB will be 3.6V (same as VDDA) and the analog function network and the LCD
driver can be activate correctly.
Note that Pin VB must be connected with a 10nF capacitor to VSS for reducing Voltage Doubler noise.
Rev. 1.4
36/146
FS98O22
Analog Common Voltage Generator
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4.4.
Figure 4-5 analog common voltage generator
6
Analog Common Voltage Generator is used to provide a voltage at the halt of AGND as 1/2 VDDA . The
Control register is ENAGND and the output is AGND. Please see Figure 4-5.
Table 4-6 analog common voltage generator register table
Address
Name
Referenced
Section
1DH
NETF
4/10/11
Bit 7
Bit 6
Bit 5
ENBAND
ENVDDA
Bit 4
Bit 3
Bit 2
Value on
Bit 0 Power on
Reset
ENAGND ENVB 00000000
Bit 1
Operation:
1.
2.
3.
4.
5.
6
Operate following the steps Chapter 4.1 to get the VGG (2 times VDD or external Power Supply).
Operate as Section 4.2 to get the VDDA (3.6V)
Operate as Section 4.3 to activate the Analog Bias Circuit
Set the ENAGND register flag.
The output, AGND, will be 1/2 VDDA
When VDDA is 3.6V, AGND would be 1.8V
Rev. 1.4
37/146
FS98O22
Low Battery Comparator
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4.5.
Figure 4-6 low battery comparator function block
Low Battery Comparator is used for VDD low voltage detection. FS98O22 embeds a voltage divider which can
generate 1/2 VDD and the 1/3 VDD. A multiplexer is used to connect the voltage divides to component input.
The multiplexer‟s output is compares with 1.2V. The Control register flags are SILB[1:0] and the ENLB. The
Output flag is LBOUT which is for read only. Please see Figure 4-6.
Table 4-7 low battery comparator register table
Address
Name
1CH
1FH
NETE
SVD
Referenced
Section
4/10/11
4.5
Bit 7
Bit 6
Bit 5
Bit 4
ENVS
Bit 3
Bit 2
SILB[1:0]
Bit 1
ENLB
Bit 0
LBOUT
Value on Power on
Reset
00000000
uuuuuuuu
Operation:
1.
2.
3.
4.
Operate as Section 4.1 to get the VGG (2 times VDD or external Power Supply).
Operate as Section 4.2 to get the VDDA (3.6V)
Operate as Section 4.3 to active the Analog Bias Circuit
Set SILB to choose the Comparator input. Please see Table 4-8
Table 4-8 low battery comparator voltage detection selection table
5.
6.
SILB [1:0]
Detection Voltage
if LBOUT = 1
00
1/2 VDD
VDD > 2.3 volt
01
1/3 VDD
VDD > 3.5 volt
10
AIN
AIN > 1.2 volt
Set the ENLB register flag, and the Low Battery Comparator is enabled.
The output, LBOUT, is the result of the comparator.
Rev. 1.4
38/146
FS98O22
Bandgap Voltage and Temperature Sensor
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4.6.
Figure 4-7 Bandgap voltage and temperature sensor function block
REFO is low temperature coefficient bandgap voltage reference output. Its voltage to AGND is 1.16V, and the
typical temperature coefficient is 150ppm/C.
FS98O22 embeds a Temperature Sensor to measure the IC temperature from the differential voltage between
TEMPH and TEMPL (typically 550μV50μV/C). Its working range is 100 ~ 200 mV. User can connect the
TEMPH and TEMPL to an ADC to get the IC temperature. Please refer to Chapter 10 and Chapter 11 for
detailed instruction of ADC.
Both the bandgap Voltage Reference and the Temperature sensor are controlled by ENBAND register flag.
Please see Figure 4-7.
Table 4-9 bandgap voltage and temperature sensor register table
Referenced
Bit 7
Bit 6
Section
ENBAND
NETF
4/10/11
Address Name
1DH
Bit 5
ENVDDA
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ENAGND
ENVB
Value on Power
on Reset
00000000
Operation:
1.
2.
3.
4.
5.
6.
Operate as Section 4.1 to get the VGG (2 times VDD or external Power Supply).
Operate as Section 4.2 to get the VDDA (3.6V)
Operate as Section 4.3 to enable the Analog Bias Circuit
Set the ENBAND register flag.
Check REFO. Its value with respect to AGND should be about 1.16V
The output, TEMPH and TEMPL, will show the IC temperature as the differential voltage.
Rev. 1.4
39/146
FS98O22
5.
Clock System
Table 5-1 FS98O22 clock system register table
Address Name
MCK
PCK
5
4/5/7.5/10
Bit 7
Bit 6
Bit 5
M7_CK
M6_CK
ENPUMP
M5_CK
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
M3_CK M2_CK M1_CK M0_CK
S_CH1CK [1:0] S_BEEP S_PCK
Value on
Power on
Reset
00000000
00000000
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14H
15H
Referenced
Section
Figure 5-1 FS98O22 clock system function block
The clock system provides clock signals for the following 7 function blocks: Voltage Doubler, ADC, CPU core,
OPAMP, Buzzer, Timer module and LCD. Users could use 10 register flags to generate all kinds of clock
signals for the above 7 function blocks. These 10 register flags are M0_CK, M1_CK, M2_CK, M3_CK, M5_CK,
M6_CK, M7_CK, S_PCK, S_CH1CK[1:0] and S_BEEP. The detailed setup will be illustrated in following
sections. Please see Figure 5-1.
Rev. 1.4
40/146
FS98O22
Oscillator State
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5.1.
Figure 5-2 FS98O22 oscillator state block
Table 5-2 FS98O22 clock system register table
Address
Name
14H
MCK
Referenced
Value on Power
Bit 7
Bit 6
Bit 5 Bit 4 Bit 3
Bit 2
Bit 1
Bit 0
Section
on Reset
5
M7_CK M6_CK M5_CK
M3_CK M2_CK M1_CK M0_CK
00000000
There are two clock sources in FS98O22. One is the internal clock which generates 1 MHZ for CPU, and the
other is an external one which provides 32768 HZ clock signal to the Chip. Users should choose one clock to
use as MCK. Please see Figure 5-2.
There are 2 clock signals working in FS98O22: MCK and CLK. Users should use Table 5-2 and 5-3 to setup
MCK and CLK based on the M0_CK, M1_CK and M3_CK.
Table 5-3 MCK selection table
M3_CK
M0_CK
MCK
X
0
ICK
0
1
ECK
1
1
ECK/2
Table 5-4 CLK selection table
Rev. 1.4
M1_CK
CLK
0
MCK
1
MCK/4
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FS98O22
To enable the internal and external oscillators, users need to set the right values for M7_CK and M6_CK as
shown in Table 5-4. If users execute the sleep instruction to make FS98O22 enter the SLEEP mode, both the
internal oscillators and the external oscillator will be disabled.
Table 5-5 oscillator state selection table
Input
Sleep instruction
Oscillator State
M7_CK
M6_CK
Internal
External
X
Disable
Disable
7
X
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1
5.2.
0
0
0
Enable
Enable
0
0
1
Enable
Disable
0
1
0
Disable
Enable
0
1
1
Enable
Disable
CPU Instruction Cycle
Table 5-6 FS98O22 CPU instruction cycle register table
Address
Name
14H
MCK
Referenced
Bit 7
Bit 6
Bit 5
Section
5
M7_CK M6_CK M5_CK
Bit 4
Value on Power
on Reset
M3_CK M2_CK M1_CK M0_CK
00000000
Bit 3
Bit 2
Bit 1
Bit 0
8
User can setup M0_CK, M1_CK, M2_CK and M3_CK to select the instruction cycle . In order to maintain a
stable ADC output, user could clear M2_CK to make CPU have a different operation clock cycle from ADC. In
the applications where a resolution of ADC is more than 13 bits, M2_CK should be set to zero.
Table 5-7 MCK selection table
M3_CK
M0_CK
MCK
X
0
ICK (1MHZ)
0
1
ECK (32768 HZ)
1
1
ECK/2 (16384HZ)
Table 5-8 instruction cycle selection table
M2_CK
M1_CK
Instruction Cycle
0
0
MCK/6.5
0
1
MCK/12.5
1
0
MCK/2
1
1
MCK/4
7
X means “don‟t care”
Users must make sure that switching from one oscillator to the other can be made only after the oscillator ‟s
output is stabilized.
An NOP command should be added after the switching.
8
Rev. 1.4
42/146
FS98O22
5.3.
ADC Sample Frequency
FS98O22 embeds one sigma delta ADC which needs clock input to generate digital output. When users want
N
ADC have N bits resolution digital output, ADC needs 2 clocks cycles input. (Please refer to Chapter 10 and
Chapter 11 for detailed description) User should setup the M1_CK to decide the ADC sample frequency. Please
see Table 5-9.
Table 5-9 ADC sample frequency selection table
ADC sample Frequency (ADCF)
0
MCK/25
1
MCK/50
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M1_CK
Rev. 1.4
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FS98O22
5.4.
Beeper Clock
Table 5-10 beeper clock register table
Name
14H
15H
MCK
PCK
Referenced
Bit 7
Bit 6
Bit 5
Section
5
M7_CK M6_CK M5_CK
ENPU
4/5/7.5/10
MP
Bit 4
Value on Power
on Reset
M3_CK M2_CK M1_CK M0_CK
00000000
S_BEE
00000000
S_CH1CK [1:0]
S_PCK
P
Bit 3
Bit 2
Bit 1
Bit 0
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Address
FS98O22 has a Beeper Clock which is used as the buzzer source. (Please refer to Section 7.5 for how to use
Buzzer) User could change the Beeper clock frequency by setting M0_CK, M1_CK, M3_CK and S_BEEP
register flags according to Table 5-11, Table 5-12 and Table 5-13.
Table 5-11 MCK selection table
M3_CK
M0_CK
MCK
X
0
ICK
0
1
ECK
1
1
ECK/2
Table 5-12 CLK selection table
M1_CK
CLK
0
MCK
1
MCK/4
Table 5-13 beeper clock selection table
Rev. 1.4
M0_CK
S_BEEP
Beeper Clock
X
0
CLK/250
0
1
CLK/375
1
1
ECK/8
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FS98O22
Table 5-14 shows the relation between clock signals and the register flags. Please see Table 5-14)
Table 5-14 register and the beeper clock selection table
M1_CK
M3_CK
S_BEEP
MCK
CLK
beep clock
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
1
1
1
1
0
0
1
1
0
0
1
1
0
0
0
0
32768
16384
32768
16384
1000000
1000000
1000000
1000000
1000000
1000000
1000000
1000000
32768
16384
32768
16384
32768
16384
8192
4096
1000000
1000000
1000000
1000000
250000
250000
250000
250000
32768
16384
8192
4096
4096
4096
4096
4096
4000
4000
2666.6667
2666.6667
1000
1000
666.6667
666.6667
131.072
65.536
32.768
16.384
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M0_CK
5.5.
Voltage Doubler Operation Frequency
FS98O22 embeds a switching voltage regulator. Users can use M0_CK and S_PCK register flags to decide the
operation frequency as in Table 5-15 and Table 5-16.
Table 5-15 MCK selection table
M3_CK
M0_CK
MCK
X
0
ICK
0
1
ECK
1
1
ECK/2
Table 5-16 Voltage Doubler operation frequency selection table
Rev. 1.4
M0_CK
S_PCK
Voltage Doubler Operation Frequency
0
0
MCK/200
0
1
MCK/100
1
X
ECK/32 (1024 HZ)
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FS98O22
5.6.
Chopper Operation Amplifier Input Control Signal
The OPAMP embedded in FS98O22 has a chopper function to cancel the inverting and non-inverting sides
voltage bias offsets. After the Chopper operation, OPAMP input voltage bias is removed. Users could setup the
S_CH1CK[1:0] to choose the Chopper Control Signal. (Please see Table 5-17, Table 5-18 and Table 5-19)
Table 5-17 CLK selection table
M1_CK
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CLK
0
MCK
1
MCK/4
Table 5-18 MCK selection table
M3_CK
M0_CK
MCK
X
0
ICK
0
1
ECK
1
1
ECK/2
Table 5-19 chopper control signal selection table
Rev. 1.4
S_CH1CK [1]
S_CH1CK [0]
Chopper Control Signal
0
0
0
0
1
1
1
0
CLK/500
1
1
CLK/1000
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FS98O22
5.7.
TMCLK – Timer and LCD Module Input Clock
TMCLK is the clock for FS98O22 Timer and LCD Module. Users can use Table 5-20 to choose TMCLK
frequency by setting the right values for M5_CK.
Table 5-20 TMCLK selection table
TMCLK (Timer and LCD Module input Clock)
0
CLK/1000
1
ECK/32
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Rev. 1.4
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FS98O22
6.
Timer Module, Watch Dog Timer and Programmable Counter
Table 6-1 Timer module and watch dog timer register table
Address
Value on Power on
Reset
00u00uuu
00000000
00000000
uuuuuuuu
uuuuuuuu
uuuuuuuu
uuuuuuuu
0000000u
0uuuu000
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04H
06H
07H
08H
09H
0AH
0BH
0CH
0DH
Referenced
Bit 7
Bit 6 Bit 5 Bit 4 Bit 3
Bit 2 Bit 1 Bit 0
Section
STATUS 1.11/3.4.2
-TO
---INTF 3/6/7/9/10/11
TMIF
----INTE 3/6/7/9/10/11 GIE
TMIE
----CTAH
6.3
CTA[15:8]
CTAL
6.3
CTA[7:0]
CTBH
6.3
CTB[15:8]
CTBL
6.3
CTB[7:0]
CTCON
6.3
TON
MUXSEL[2:0]
TE FQTMB OVAB
WDTCO
6.2
WDTEN
WTS [2:0]
N
TMOUT
6.1
TMOUT [7:0]
TMCON
6.1
TRST
TMEN
INS [2:0]
Name
0EH
0FH
00000000
1uuu0000
The Registers are described as follows.
Register CTAH at address 08H
property
R –X
R-X
R-X
CTAH
R-X
R-X
R-X
R-X
R-X
CTA[15:8]
Bit7
Bit0
Register CTAL at address 09H
property
R-X
R-X
R-X
CTAL
R-X
R-X
R-X
R-X
CTA[7:0]
Bit7
Bit 15-0
R-X
Bit0
CTA[15:0]: Programmable Counter 16-bit Counter A register (Please refer to Section 6.3 for detail)
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
48/146
FS98O22
Register CTBH at address 0AH
property
R/W-X
R/W-X
R/W-X
CTBH
R/W-X
R/W-X
R/W-X
R/W-X
R/W-X
CTB[15:8]
Bit7
Bit0
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Register CTBL at address 0BH
property
R/W-X
R/W-X
R/W-X
CTBL
R/W-X
R/W-X
R/W-X
R/W-X
CTB[7:0]
Bit7
Bit 15-0
R/W-X
Bit0
CTB[15:0]: Programmable Counter 16-bit Counter B register (Please refer to Section 6.3 for detail)
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
49/146
FS98O22
Register CTCON at address 0CH
property
R/W-0
CTCON
TON
R/W-0
R/W-0
R/W-0
MUXSEL[2:0]
R/W-0
R/W-0
R/W-0
R/W-X
TE
FQTMB
OVAB
--
Bit7
Bit 7
Bit0
TON: 16-bit Counter input signal switch (Please refer to Section 6.2 for detail)
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1 = The 16-bit Counter input signal switch is ON.
0 = The 16-bit Counter input signal switch is OFF.
Bit 6
MUXSEL[2]: Programmable Counter Counter/Pulse Width measurement mode selector.
1 = Programmable Counter is used as Pulse Width measurement.
0 = Programmable Counter is used as General Counter.
Bit 5-4
MUXSEL[1:0]: Counter A clock source select multiplexer 1.
11 = PFI, GPIO 3 port 2.
10 = ECK, External Clock (32768HZ)
01 = Instruction clock, please see Section 5.2
00 = ICK, Internal Clock (1MHZ)
Bit 3
TE: PFI signal inverting register
1 = PFI signal is inverted
0 = PFI signal is NOT inverted
Bit 2
FQTMB: Programmable Counter Frequency measurement mode enabled register flag.
1 = Programmable Counter is used as Frequency measurement.
0 = Programmable Counter is used as General Counter or Pulse Width measurement.
Bit 1
OVAB: Programmable Counter interrupt source selector
1 = Programmable Counter interrupt source is Counter A.
0 = Programmable Counter interrupt source is Counter B.
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
50/146
FS98O22
Register WDTCON at address 0DH
property
R/W-0
WDTCON
U-X
U-X
U-X
U-X
R/W-0
WDTEN
R/W-0
WTS [2:0]
Bit7
Bit0
WDTEN: Watch Dog Timer enable flag (Please refer to Section 6.2 for detail)
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Bit 7
R/W-0
1 = Watch Dog Timer is enabled.
0 = Watch Dog Timer is disabled
Bit 2-0
WTS [2:0]: Watch Dog Timer counter 2 Input Selector (Please refer to Chapter 6.2 for details)
111 = Watch Dog Timer Counter 2 Input is WDTA[0]
110 = Watch Dog Timer Counter 2 Input is WDTA[1]
101 = Watch Dog Timer Counter 2 Input is WDTA[2]
100 = Watch Dog Timer Counter 2 Input is WDTA[3]
011 = Watch Dog Timer Counter 2 Input is WDTA[4]
010 = Watch Dog Timer Counter 2 Input is WDTA[5]
001 = Watch Dog Timer Counter 2 Input is WDTA[6]
000 = Watch Dog Timer Counter 2 Input is WDTA[7]
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
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FS98O22
Register TMOUT at address 0EH
property
R-0
R-0
R-0
R-0
TMOUT
R-0
R-0
R-0
TMOUT [7:0]
Bit7
Bit0
TMOUT [7:0]: Timer module 8-bit counter output (Please refer to Section 6.1 for detail)
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Bit 7-0
R-0
Register TMCON at address 0FH
property
R/W-1
TMCON
TRST
U-X
U-X
U-X
R/W-0
R/W-0
TMEN
R/W-0
INS [2:0]
Bit7
Bit 7
R/W-0
Bit0
TRST: Timer Module reset flag (Please refer to Section 6.1 for detail)
1 = Timer Module Counter works normally.
0 = Timer Module Counter is reset.(After resetting the Counter, TRST will reset itself)
Bit 3
TMEN: Timer Module enable flag (Please refer to Section 6.1 for detail)
1 = Timer Module Counter will active.
0 = Timer Module Counter will be disabled.
Bit 2-0
INS [2:0]: Timer Module interrupt Signal Selector (Please refer to Chapter 6.1 for detail)
111 = TMOUT[7] is selected as Timer Module interrupt Signal
110 = TMOUT[6] is selected as Timer Module interrupt Signal
101 = TMOUT[5] is selected as Timer Module interrupt Signal
100 = TMOUT[4] is selected as Timer Module interrupt Signal
011 = TMOUT[3] is selected as Timer Module interrupt Signal
010 = TMOUT[2] is selected as Timer Module interrupt Signal
001 = TMOUT[1] is selected as Timer Module interrupt Signal
000 = TMOUT[0] is selected as Timer Module interrupt Signal
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
X = Bit is unknown
There are two timers in FS98O22: Timer Module and Watch Dog Timer. Please see the following sections for
detail.
Rev. 1.4
52/146
FS98O22
6.1.
Timer Module
The Timer module has the following features:
8-bit Timer Counter
Internal (1 MHZ) or External (32768HZ) clock selection
Time out Interrupt Signal selection
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


TMOUT[7:0]
TMEN
EN
Out
8 to 1
Mux
Timer Interrupt Signal
8 bits Counter
TMCLK
Frequency
Divider
TMCLK/4
CK
Reset
TMRST
Figure 6-1 FS98O22 timer module function block
Please see Figure 6-1. The input of Timer Module is TMCLK. (Please refer to Section 5.7 for the detailed
setting) FS98O22 embeds a Frequency Divider in the Timer Module to divide the TMCLK by 4, and treats the
divided clock signal as 8-bit counter input clock. When a user sets the Timer Module enable flag, the 8-bit
counter will activate, and the TMOUT[7:0] will increase from 0x00H to 0xFFH. User needs to setup INS (Timer
Module interrupt Signal Selector) to select the time out interrupt signal. When timer out event happens, the
interrupt Flag will set itself and the program counter will jump to 0x04H for ISR (Interrupt Service Routine)
Rev. 1.4
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FS98O22
6.1.1.
Timer module interrupt
Table 6-2 timer module interrupt register table
Address
06H
07H
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
TMIF
--
--
--
--
TMIE
--
--
--
--
TMOUT [7:0]
TMEN
Value on Power on
Reset
00000000
00000000
00000000
1uuu0000
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0EH
0FH
Referenced
Bit 7
Section
INTF
3/6/7/9/10/1
1
INTE
3/6/7/9/10/1
GIE
1
TMOUT
6.1
TMCON
6.1
TRST
Name
INS [2:0]
Operation:
1.
2.
3.
4.
5.
6.
Operate as Section 5.7 to setup the TMCLK for Timer module input
Setup the INS[2:0] to select timer interrupt source. Please see Table 6-3.
Set the TMIE and GIE register flags to enable the Timer interrupt.
Set the TMEN register flag to enable Timer module 8-bit counter.
Clear the TRST register flag to reset the Timer module 8-bit counter
When time out event happens, TMIF register flag will reset itself, and the program counter will reset to
0x04H
Table 6-3 timer selection table
Rev. 1.4
INS[2:0]
interrupt source
Time at TMCLK=1024Hz (ECK/32)
000
TMOUT[0]
1/128 sec.
001
TMOUT[1]
1/64 sec.
010
TMOUT[2]
1/32 sec.
011
TMOUT[3]
1/16 sec.
100
TMOUT[4]
1/8 sec.
101
TMOUT[5]
1/4 sec.
110
TMOUT[6]
1/2 sec.
111
TMOUT[7]
1 sec.
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FS98O22
6.1.2.
Using Timer with External/Internal Clock
The user could see the Table 6-4, 6-5, 6-6 and 6-7 to setup related registers to decide the clock source.
Table 6-4 external timer setup register table
Address Name
14H
MCK
Detail on
Chapter
5
Bit 7
Bit 6
Bit 5
Bit 4
M7_CK M6_CK M5_CK
Value on Power on
Reset
M3_CK M2_CK M1_CK M0_CK
00000000
Bit 3
Bit 2
Bit 1
Bit 0
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Table 6-5 CLK selection table
M1_CK
CLK
0
MCK
1
MCK/4
Table 6-6 MCK selection table
M3_CK
M0_CK
MCK
X
0
ICK
0
1
ECK
1
1
ECK/2
Table 6-7 TMCLK selection table
Rev. 1.4
M5_CK
TMCLK (Timer and LCD Module input Clock)
0
CLK/1000
1
ECK/32
55/146
FS98O22
Users can use Table 6-8 to select TMCLK clock source based on M0_CK, M1_CK, M3_CK and M5_CK register
flag.
Table 6-8 registers and timer selection table
M1_CK
M3_CK
M5_CK
MCK
CLK
TMCLK
0
0
0
1
1000000
1000000
1024
0
0
1
1
1000000
1000000
1024
0
1
0
1
1000000
500000
1024
0
1
1
1
1000000
500000
1024
1
0
0
1
32768
32768
1024
1
1
0
1
32768
16384
1024
1
0
1
1
16384
16384
1024
1
1
1
1
16384
8192
1024
0
0
0
0
1000000
1000000
1000
0
0
1
0
1000000
1000000
1000
0
1
0
0
1000000
500000
500
0
1
1
0
1000000
500000
500
1
0
0
0
32768
32768
32.768
1
1
0
0
32768
16384
16.384
1
0
1
0
16384
16384
16.384
1
1
1
0
16384
8192
8.192
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Rev. 1.4
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FS98O22
6.2.
Watch Dog Timer
Watch Dog
Timer
Oscillator
WDTA[7:0]
8 bits Counter1
Multiplex
8 bits Counter2
WDTOUT
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WDTEN
WDTS[2:0]
CLRWDT
Figure 6-2 watch dog timer function block
Please see Figure 6-2. WDT (Watch Dog Timer) is used to prevent the program from being out of control by any
uncertain reason. When WDT is active, it will reset the CPU when the WDT timeout. Generally, the program run
in FS98O22 needs to reset the WDT before the WDT times out every time to reset the CPU. When some
trouble happens, the program will be reset to the general situation by WDT and the program won‟t reset the
WDT in that situation.
The input of Watch Dog Timer is WDTEN and WDTS[2:0] register flags. The output of Watch Dog Timer is TO
register flag. When a user sets the WDTEN, the embedded Watch Dog Timer Oscillator (3 KHZ) will become
active, and the generated clock will be pushed into the “8-bit counter 1” as shown in Figure 6-2. The output of
the “8-bit counter 1”, WDTA[7:0], is a virtual signal which is sent to one multiplexer. The multiplexer is controlled
by the register flags, WDTS[2:0]. The output signal is used as the “8-bit Counter 2” clock input. When “8-bit
Counter 2” overflows, it will send WDTOUT to reset the CPU (Program Counter will jump to 0x00H to reset the
program) and set TO flag. Users could reset the WDT by the instruction – CLRWDT.
Table 6-9 watch dog timer register table
Address Name
04H
0DH
STAT
US
WDT
CON
Referenced
Section
Bit 7
Bit 6
Bit 5
1.11/3.4.2
6.3
Bit 4
Bit 3
--
TO
Bit 2 Bit 1
WDTEN
--
Bit 0
--
WDTS [2:0]
--
Value on Power on Reset
00u00uuu
0uuuu000
Operation:
1.
Setup the WDTS[2:0] to decide the WDT timeout frequency.
2.
Set WDTEN register flag to enable the WDT.
3.
Process the CLRWDT instruction to reset the WDT in the program.
Rev. 1.4
57/146
FS98O22
6.3.
Dual 16-bit Programmable Counter
Content ( u mean unknown or unchanged)
CTIF
CTIE
CTA[15:8]
CTA[7:0]
CTB[15:8]
CTB[7:0]
MUXSEL[2:0]
TE
FQTMB
PFOEN
-
-
-
Reset State
00000000
00000000
00000000
uuuuuuuu
uuuuuuuu
uuuuuuuu
uuuuuuuu
0000000u
00000000
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Address Name
07H
INTE
GIE
16H
INTF2
17H
INTE2
08H
CTAH
09H
CTAL
0AH
CTBH
0BH
CTBL
0CH
CTCON TON
2BH
PT3MR
OVAB
-
Figure 6-3 Programmable Counter Working block diagram
FS98O22 embeds Dual 16-bit Programmable Counter. It could be used under three working modes: Counter
mode, Pulse Width Measurement mode and Frequency Measurement mode. Users could setup MUXSEL[2]
and FQTMB register flags to deice the working mode.
Table 6-10 Programmable Counter working mode selection table
Working mode
Counter mode
Pulse Width Measurement mode
Frequency Measurement mode
NONE
Rev. 1.4
MUXSEL[2]
0
1
0
1
FQTMB
0
0
1
1
58/146
FS98O22

Counter mode:
There are two 16-bit counters (CTA and CTB) in Programmable Counter unit.
Operation:
1.
2.
Clear FQTMB and MUXSEL[2] register flags to make the Programmable Counter work as Counter.
Setup MUXSEL[1:0] to decide the input clock signal.
Table 6-11 Programmable Counter Clock signal selection table
Clock signal
PFI
ECK
Instruction Cycle
ICK
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MUXSEL[1:0]
11
10
01
00
3.
4.
5.
6.
7.
8.
9.
If PFI is assigned to be the Clock signal, users could set TE to invert the PFI voltage level.
Clear OVAB register flag to set the CTA as the working counter. When CTA counter overflows, the
interrupt (CTIE) will be triggered.
Clear CTIF and set the CTIE and GIE register flag to enable the Programmable Counter interrupt.
Setup CTB[15:0]. CTA[15:0] will be filled with the same value as CTB[15:0]. When CTA[15:0] overflows, it
will be filled with the same value again. User could decide CTA timeout by setting up CTB[15:0] register.
Set TON to start the counter.
When CTA counter overflows, the interrupt will be triggered.
Users could clear TON register flag to stop the counting process.
CLK
TON
Software Set
Software Clear
CTA_CLK
CTA
XXXX
FFF9
CTB
XXXX
FFF9
FFFA
FFFB
FFFC
FFFD
FFFE
FFFF
FFF9
FFFA
0
1
X
FFFC
FFFD
FFFE
FFFF
FFFA
FFFB
FFFC
FFFD
FFFE
FFFF
FFFA
FFFB
FFFC
FFFA
Software Write into CTB (CTA same as CTB)
INT
FFFB
1
Software Write into CTB
CTIF
When CTIE=1
Software Clear
Software no Clear
Figure 6-4 Programmable
Counter/TimerCounter
Mode Counter mode
Rev. 1.4
59/146
FS98O22

Pulse Width Measurement mode:
Programmable Counter could be used to measure the time when a signal holds its voltage level in high or
low.
Operation:
1.
2.
3.
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4.
Clear FQTMB and clear MUXSEL[2] register flags to make the Programmable Counter work as Pulse
Width Measurement.
Setup MUXSEL[1:0] to decide the input clock signal.
PFI is the signal which is ready to measure the pulse width. Users could set TE to invert the PFI voltage
level.
Clear OVAB register flag to set the CTA as the working counter. When CTA counter overflows, the
interrupt (CTIE) will be triggered.
Clear CTIF and set the CTIE and GIE register flags to enable the Programmable Counter interrupt.
Setup CTB[15:0]. CTA[15:0] will be filled with the same value as CTB[15:0]. When CTA[15:0] overflows, it
will be filled with the same value again. User could decide CTA timeout by setting up CTB[15:0] register.
Set TON to start the Pulse Width Measurement.
When PFI signal is from high to low, CTA counter will stop counting and clear TON register flag. Interrupt
will be triggered at the same time. Users could read the CTA counter value to know the pulse width of
PFI.
If CTA counter overflows, and the PFI signal is still high, the interrupt will be triggered, but CTA will count
again.
5.
6.
7.
8.
9.
CLK
TON
Software Set
PFII
CTA_CLK
CTA
XXXX
0000
0001
0002
0003
0004
0005
0006
0007
0008
0009
Software Write into CTB (CTA same as CTB)
INT
X
1
CTIF
When CTIE=1
Figure 6-5 Programmable
Counter
Pulse Width
Measurement mode
Pulse Width
Measurement
Mode
Rev. 1.4
60/146
FS98O22

Frequency Measurement mode:
Programmable Counter could be used to measure a signal frequency.
Operation:
1.
2.
3.
4.
FO
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5.
6.
Set FQTMB and clear MUXSEL[2] register flags to make the Programmable Counter work as Frequency
Measurement.
Setup MUXSEL[1:0] to decide the input clock signal.
PFI is the signal which is ready to measure the frequency. Users could set TE to invert the PFI voltage
level.
Clear OVAB register flag to set the CTA as the working counter. When CTA counter overflows, the
interrupt (CTIE) will be triggered.
Clear CTIF and set the CTIE and GIE register flags to enable the Programmable Counter interrupt.
Setup CTB[15:0]. CTA[15:0] will be filled with the same value as CTB[15:0]. When CTA[15:0] overflows, it
will be filled with the same value again. User could decide CTA timeout by setting up CTB[15:0] register.
Set TON to start the Frequency Measurement.
When CTA counter overflows, the interrupt will be triggered. TON register flag will be clear automatically.
Users could read the CTB value to know the PFI signal frequency.
7.
8.
9.
CLK
PFII
TON
Software Set
CTA_CLK
CTB_CLK
FQTMB
CTA
XXXX
FFEA
CTB
XXXX
FFEA
FFEB
FFEC
FFED
FFEB
FFEE
FFEF
FFEC
FFF0
FFF1
FFF2
FFED
FFF3
FFF4
FFEE
FFF5
FFF6
FFF7
FFEF
FFF8
FFF9
FFF0
FFFA
FFFB
FFFC
FFFD
FFF1
FFFE
FFFF
0000
FFF2
Software Write into CTB (CTA same as CTB)
INT
X
1
CTIF
When CTIE=1
Frequency Measurement Mode
Figure 6-6 Programmable Counter Frequency Measurement mode
Rev. 1.4
61/146
FS98O22
7.
I/O Port
Table 7-1 FS98O22 I/O port register table
Address Name
INTF
INTE
INTF2
INTE2
PT1
PT1EN
PT1PU
AIENB1
PT2
PT2EN
PT2PU
PT2MR
PT3
PT3EN
PT3PU
PT3MR
PT2OC
B
Bit 7 Bit 6 Bit 5
GIE
Bit 4
Bit 3
---
I2CIF
I2CIE
Bit 2 Bit 1
---
PT1 [7:0]
PT1EN [7:0]
PT1PU [7:0]
AIENB[5:0]
PT2 [7:0]
PT2EN [7:0]
PT2PU [7:0]
PM1EN
E1M[1:0]
PT3 [7:0]
PT3EN [7:0]
PT3PU [7:0]
PFOEN
E3M[1:0]
E1IF
E1IE
E3IF
E3IE
Bit 0
E0IF
E0IE
E2IF
E2IE
Value on Power on Reset
00000000
00000000
00000000
00000000
uuuuuuuu
00000000
00000000
00000000
uuuuuuuu
00000000
00000000
00000000
uuuuuuuu
00000000
00000000
00000000
uuu11uuu
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06H
07H
16H
17H
20H
21H
22H
23H
24H
25H
26H
27H
28H
29H
2AH
2BH
37H
Detail on
Chapter
3/6/7/9/10/11
3/6/7/9/10/11
6/7
6/7
7
7
7
7
7
7
7
7.2/7.5/8
9
AIENB[7:6]
BZEN
PT2OC[4:3]
E0M[1:0]
E2M[1:0]
The GPIO (General Purpose Input Output) in a micro-controller is used for general purpose input or output
function. Users could use these ports to get digital signal or transmit data to any other digital device. Some
GPIOs in FS98O22 are also defined for other special functions. In this Chapter, the GPIO will be illustrated as
the GPIO function. The special functions defined in the GPIO will be illustrated in the following Chapters.
Rev. 1.4
62/146
FS98O22
Register PT1 at address 20H
property
R/W-X
R/W-X
R/W-X
PT1
R/W-X
R/W-X
R/W-X
R/W-X
R/W-X
PT1 [7:0]
Bit7
Bit 7-0
Bit0
PT1[7:0]: GPIO Port 1 data flag (Please refer to Section 7.1 for detail)
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PT1[7] = GPIO Port 1 bit 7 data flag
PT1[6] = GPIO Port 1 bit 6 data flag
PT1[5] = GPIO Port 1 bit 5 data flag
PT1[4] = GPIO Port 1 bit 4 data flag
PT1[3] = GPIO Port 1 bit 3 data flag
PT1[2] = GPIO Port 1 bit 2 data flag
PT1[1] = GPIO Port 1 bit 1 data flag
PT1[0] = GPIO Port 1 bit 0 data flag
Register PT1EN at address 21H
property
R/W-0
R/W-0
R/W-0
PT1EN
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
PT1EN [7:0]
Bit7
Bit 7-0
Bit0
PT1EN [7:0]: GPIO Port 1 Input / Output control flag (Please refer to Section 7.1 for detail)
PT1EN[7] = GPIO Port 1 bit 7 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT1EN[6] = GPIO Port 1 bit 6 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT1EN[5] = GPIO Port 1 bit 5 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT1EN[4] = GPIO Port 1 bit 4 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT1EN[3] = GPIO Port 1 bit 3 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT1EN[2] = GPIO Port 1 bit 2 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT1EN[1] = GPIO Port 1 bit 1 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT1EN[0] = GPIO Port 1 bit 0 I/O control flag ; 0 = defined as input port, 1 = defined as output port
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
X = Bit is unknown
Register PT1PU at address 22H
Rev. 1.4
63/146
FS98O22
property
R/W-0
R/W-0
R/W-0
PT1PU
R/W-0
R/W-0
R/W-0
Bit0
PT1PU [7:0]: GPIO Port 1 Pull up resistor enable flag (Please refer to Section 7.1 for detail)
PT1EN[7] = GPIO Port 1 bit 7 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
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resistor
R/W-0
PT1PU [7:0]
Bit7
Bit 7-0
R/W-0
resistor
resistor
resistor
resistor
resistor
resistor
resistor
PT1EN[6] = GPIO Port 1 bit 6 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
PT1EN[5] = GPIO Port 1 bit 5 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
PT1EN[4] = GPIO Port 1 bit 4 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
PT1EN[3] = GPIO Port 1 bit 3 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
PT1EN[2] = GPIO Port 1 bit 2 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
PT1EN[1] = GPIO Port 1 bit 1 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
PT1EN[0] = GPIO Port 1 bit 0 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
64/146
FS98O22
Register AIENB1 at address 23H
property
R/W-0
R/W-0
R/W-0
AIENB1
R/W-0
R/W-0
R/W-0
R/W-0
AIENB[7:0]
Bit7
Bit0
AIENB1[7:0]: GPIO Port 1 Analog / Digital control flag (Please refer to Section 7.1 for detail)
AIENB1[7] = GPIO Port 1 bit 7 D/A flag ; 0 = defined as Analog channel, 1 = defined as Digital
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Bit 7-0
R/W-0
channel
channel
AIENB1[6] = GPIO Port 1 bit 6 D/A flag ; 0 = defined as Analog channel, 1 = defined as Digital
AIENB1[5] = GPIO Port 1 bit 5 D/A flag ; 0 = defined as Analog channel, 1 = defined as Digital
channel
channel
channel
channel
channel
channel
AIENB1[4] = GPIO Port 1 bit 4 D/A flag ; 0 = defined as Analog channel, 1 = defined as Digital
AIENB1[3] = GPIO Port 1 bit 3 D/A flag ; 0 = defined as Analog channel, 1 = defined as Digital
AIENB1[2] = GPIO Port 1 bit 2 D/A flag ; 0 = defined as Analog channel, 1 = defined as Digital
AIENB1[1] = GPIO Port 1 bit 1 D/A flag ; 0 = defined as Analog channel, 1 = defined as Digital
AIENB1[0] = GPIO Port 1 bit 0 D/A flag ; 0 = defined as Analog channel, 1 = defined as Digital
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
65/146
FS98O22
Register PT2 at address 24H
property
R/W-X
R/W-X
R/W-X
PT2
R/W-X
R/W-X
R/W-X
R/W-X
PT2 [7:0]
Bit7
Bit 7-0
R/W-X
Bit0
PT2[7 :0] : GPIO Port 2 data flag
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PT2[7] = GPIO Port 2 bit 7 data flag
PT2[6] = GPIO Port 2 bit 6 data flag
PT2[5] = GPIO Port 2 bit 5 data flag
PT2[4] = GPIO Port 2 bit 4 data flag
PT2[3] = GPIO Port 2 bit 3 data flag
PT2[2] = GPIO Port 2 bit 2 data flag
PT2[1] = GPIO Port 2 bit 1 data flag
PT2[0] = GPIO Port 2 bit 0 data flag
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
66/146
FS98O22
Register PT2EN at address 25H
property
R/W-0
R/W-0
R/W-0
PT2EN
R/W-0
R/W-0
R/W-0
R/W-0
PT2EN [7:0]
Bit7
Bit 7-0
R/W-0
Bit0
PT2EN [7 :0] : GPIO Port 2 Input / Output control flag
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PT2EN[7] = GPIO Port 2 bit 7 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT2EN[6] = GPIO Port 2 bit 6 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT2EN[5] = GPIO Port 2 bit 5 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT2EN[4] = GPIO Port 2 bit 4 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT2EN[3] = GPIO Port 2 bit 3 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT2EN[2] = GPIO Port 2 bit 2 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT2EN[1] = GPIO Port 2 bit 1 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT2EN[0] = GPIO Port 2 bit 0 I/O control flag ; 0 = defined as input port, 1 = defined as output port
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
67/146
FS98O22
Register PT2PU at address 26H
R/W-0
R/W-0
R/W-0
PT2PU
R/W-0
R/W-0
R/W-0
R/W-0
PT2PU [7:0]
Bit7
Bit0
PT2PU [7:0]: GPIO Port 2 Pull up resistor enable flag
PT2PU[7] = GPIO Port 2 bit 7 control flag ; 0 = Pull up resistor is disconnect, 1 = with Pull up
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Bit 7-0
R/W-0
resistor
resistor
resistor
resistor
resistor
resistor
resistor
resistor
PT2PU[6] = GPIO Port 2 bit 6 control flag ; 0 = Pull up resistor is disconnect, 1 = with Pull up
PT2PU[5] = GPIO Port 2 bit 5 control flag ; 0 = Pull up resistor is disconnect, 1 = with Pull up
PT2PU[4] = GPIO Port 2 bit 4 control flag ; 0 = Pull up resistor is disconnect, 1 = with Pull up
PT2PU[3] = GPIO Port 2 bit 3 control flag ; 0 = Pull up resistor is disconnect, 1 = with Pull up
PT2PU[2] = GPIO Port 2 bit 2 control flag ; 0 = Pull up resistor is disconnect, 1 = with Pull up
PT2PU[1] = GPIO Port 2 bit 1 control flag ; 0 = Pull up resistor is disconnect, 1 = with Pull up
PT2PU[0] = GPIO Port 2 bit 0 control flag ; 0 = Pull up resistor is disconnect, 1 = with Pull up
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
68/146
FS98O22
Register PT2MR at address 27H
property
R/W-0
PT2MR
BZEN
U-0
U-0
R/W-0
PM1EN
R/W-0
R/W-0
E1M[1:0]
R/W-0
E0M[1:0]
Bit7
Bit 7
R/W-0
Bit0
BZEN: Buzzer enable flag (Please refer to Section 7.5 for detail)
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1 = Buzzer function is enabled, GPIO Port 2 bit 7 is defined as Buzzer output.
0 = Buzzer function is disabled, GPIO Port 2 bit 7 is defined as GPIO.
Bit 4
PM1EN: PDM Module enable flag (Please refer to Chapter 8 for detail)
1 = PDM Module is enabled, GPIO Port 2 bit 2 is defined as PDM output.
0 = PDM Module is disabled, GPIO Port 2 bit 2 is defined as GPIO.
Bit 3-2
E1M[1:0]: GPIO Port 2 bit 1 interrupt trigger mode (Please refer to Section 7.2 for detail)
11 = External Interrupt 1 (GPIO Port 2 bit 1) is triggered at state change
10 = External Interrupt 1 (GPIO Port 2 bit 1) is triggered at state change
01 = External Interrupt 1 (GPIO Port 2 bit 1) is triggered at positive edge
00 = External Interrupt 1 (GPIO Port 2 bit 1) is triggered at negative edge
Bit 1-0
E0M[1:0]: GPIO Port 2 bit 0 interrupt trigger mode (Please refer to Section 7.2 for detail)
11 = External Interrupt 0 (GPIO Port 2 bit 0) is triggered at state change
10 = External Interrupt 0 (GPIO Port 2 bit 0) is triggered at state change
01 = External Interrupt 0 (GPIO Port 2 bit 0) is triggered at positive edge
00 = External Interrupt 0 (GPIO Port 2 bit 0) is triggered at negative edge
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
69/146
FS98O22
Register PT3 at address 28H
property
R/W-X
R/W-X
R/W-X
PT3
R/W-X
R/W-X
R/W-X
R/W-X
PT3 [7:0]
Bit7
Bit0
PT3[7 :0] : GPIO Port 3 data flag
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Bit 7-0
R/W-X
PT3[7] = GPIO Port 3 bit 7 data flag
PT3[6] = GPIO Port 3 bit 6 data flag
PT3[5] = GPIO Port 3 bit 5 data flag
PT3[4] = GPIO Port 3 bit 4 data flag
PT3[3] = GPIO Port 3 bit 3 data flag
PT3[2] = GPIO Port 3 bit 2 data flag
PT3[1] = GPIO Port 3 bit 1 data flag
PT3[0] = GPIO Port 3 bit 0 data flag
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
70/146
FS98O22
Register PT3EN at address 29H
property
R/W-0
R/W-0
R/W-0
PT3EN
R/W-0
R/W-0
R/W-0
R/W-0
PT3EN [7:0]
Bit7
Bit 7-0
R/W-0
Bit0
PT3EN [7 :0] : GPIO Port 3 Input / Output control flag
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PT3EN[7] = GPIO Port 3 bit 7 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT3EN[6] = GPIO Port 3 bit 6 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT3EN[5] = GPIO Port 3 bit 5 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT3EN[4] = GPIO Port 3 bit 4 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT3EN[3] = GPIO Port 3 bit 3 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT3EN[2] = GPIO Port 3 bit 2 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT3EN[1] = GPIO Port 3 bit 1 I/O control flag ; 0 = defined as input port, 1 = defined as output port
PT3EN[0] = GPIO Port 3 bit 0 I/O control flag ; 0 = defined as input port, 1 = defined as output port
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
71/146
FS98O22
Register PT3PU at address 2AH
R/W-0
R/W-0
R/W-0
PT3PU
R/W-0
R/W-0
R/W-0
R/W-0
PT3PU [7:0]
Bit7
Bit0
PT3PU [7:0]: GPIO Port 3 Pull up resistor enable flag
PT3PU[7] = GPIO Port 3 bit 7 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
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Bit 7-0
R/W-0
resistor
resistor
resistor
resistor
resistor
resistor
resistor
resistor
PT3PU[6] = GPIO Port 3 bit 6 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
PT3PU[5] = GPIO Port 3 bit 5 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
PT3PU[4] = GPIO Port 3 bit 4 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
PT3PU[3] = GPIO Port 3 bit 3 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
PT3PU[2] = GPIO Port 3 bit 2 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
PT3PU[1] = GPIO Port 3 bit 1 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
PT3PU[0] = GPIO Port 3 bit 0 control flag ; 0 = Pull up resistor is disconnected, 1 = with Pull up
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
72/146
FS98O22
Register PT3MR at address 2BH
property
R/W-0
U-0
U-0
PT3MR
R/W-0
R/W-0
PFOEN
R/W-0
E3M[1:0]
R/W-0
E2M[1:0]
Bit7
Bit 4
R/W-0
Bit0
PFOEN: Programmable Counter Enabled register flag
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1 = Programmable Counter is enabled
0 = Programmable Counter is disabled
Bit 3-2
E3M[1:0]: GPIO Port 3 bit 1 interrupt trigger mode (Please refer to Section 7.2 for detail)
11 = External Interrupt 4 (GPIO Port 3 bit 1) is triggered at state change
10 = External Interrupt 4 (GPIO Port 3 bit 1) is triggered at state change
01 = External Interrupt 4 (GPIO Port 3 bit 1) is triggered at positive edge
00 = External Interrupt 4 (GPIO Port 3 bit 1) is triggered at negative edge
Bit 1-0
E2M[1:0]: GPIO Port 3 bit 0 interrupt trigger mode (Please refer to Section 7.2 for detail)
11 = External Interrupt 3 (GPIO Port 3 bit 0) is triggered at state change
10 = External Interrupt 3 (GPIO Port 3 bit 0) is triggered at state change
01 = External Interrupt 3 (GPIO Port 3 bit 0) is triggered at positive edge
00 = External Interrupt 3 (GPIO Port 3 bit 0) is triggered at negative edge
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
73/146
FS98O22
Register PT2OCB at address 37H
property
U-X
U-X
U-X
PT2OCB
R/W-1
R/W-1
U-X
U-X
PT2OC[4:3]
Bit7
Bit0
PT2OC[4:3]: GPIO Port 2 Open Drain control flag
PT2OC[4] = GPIO Port 2 bit 4 Open Drain control flag ; 0 = normal digital I/O, 1 = Open Drain
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Bit 4-3
U-X
Control
Control
PT2OC[3] = GPIO Port 2 bit 3 Open Drain control flag ; 0 = normal digital I/O, 1 = Open Drain
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
74/146
FS98O22
Digital I/O Port with Analog Input Channel Shared: PT1[7:0]
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7.1.
Figure 7-1 PT1[7:0] function block
GPIO Port 1 (PT1[7:0]) function block is shown in Figure 7-1. The main function of the GPIO is for data
exchange between the Data bus and the ports. Users could control the PT1EN[7:0] register flags to decide the
input and output direction. The input and output function and the related functions are explained as follows:

Input:
GPIO Port 1 Bit0 to Bit7 (PT1[7:0]) could be used to get both the digital signal and the analog signal. User
should control the AIENB[7:0] register flags to decide the input type. If user sets the AIENB, the AND gate
embedded in the GPIO Port1 will allow the digital data to connect to the data bus. Otherwise, the Input
signals will be defined as analog signals and sent to the related function blocks (ADC, OPAMP…etc)

Output
FS98O22 sends the digital data out by an embedded D Flip Flop. When the program sends data out
through PT1, the data will be sent to data bus first, and then the D Flip Flop will latch the signal for PT1
output while the Write signal and AR (FS98O22 internal device address pointer) is pointed to PT1.

Pull up resistor
9
FS98O22 embeds an internal pull up resistor function in PT1 with about 1000k ohm resistor . Users
could control the PT1PU[7:0] register flags to decide the connections to pull up resistor. When a port is
connected to the pull up resistor, the input data is, by default, assigned to high (data 1).
9
The pull up current is about 10uA. Remember to disable PT1PU before program falls into Sleep mode.
Rev. 1.4
75/146
FS98O22
Table 7-2 PT1 register table
Detail on
Chapter
PT1
7
PT1EN
7
PT1PU
7
AIENB1
7
Address Name
20H
21H
22H
23H
Bit 7
Bit 6
AIENB[7:6]
Bit 5
Bit 4
Bit 3
Bit 2
PT1 [7:0]
PT1EN [7:0]
PT1PU [7:0]
AIENB[5:0]
Bit 1
Bit 0
Value on Power on
Reset
uuuuuuuu
00000000
00000000
00000000
Read data Operation
10
Clear the PT1EN[n] register flags. The PT1[n] will be defined as an input port.
Set the PT1PU[n] register as required. The PT1[n] will be connected to an internal pull up resistor.
Set the AIENB[n] register flags if the input signals are analog signals.(n = 7 to 0)
11
Clear the AIENB[n] register flags if the input signals are analog signals. (n = 7 to 0 )
The VDDA Regulator must be enabled first, and then the AIN0~AIN7 can work correctly. (Please refer to
Chapter 4)
After the signal input from outside, users can get the data through PT1[n]
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1.
2.
3.
4.
5.
6.
Write data Operation
1.
2.
3.
Set the PT1EN[n] register flags. The PT1[n] will be defined as an output port.
Set the PT1PU[n] register as required. The PT1[n] will be connected to an internal pull up resistor.
Set the PT1[n] to output the data. The embedded D Flip Flop will latch the data till PT1[n] is changed.
Notice Operation
1.
2.
10
11
To keep low operation current in SLEEP mode, set AIENB[7:0] to let the PT1 be floating.
Parallel a small resistor (about 10k ohm) between ports and VDD to increase the possible output current
when the PT1PU[n] is set.
n means the bits indexes user want to control
PT1 bit6 and bit7 could only be defined as digital signal input.
Rev. 1.4
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FS98O22
Digital I/O Port and External Interrupt Input : PT2[0], PT2[1], PT3[0], PT3[1]
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7.2.
Figure 7-2 PT2[0] PT2[1] PT3[0] PT3[1] function block
GPIO Port 2 Bit1 and Bit 0 (PT2[1:0])and Port 3 Bit1 and Bit 0 (PT3[1:0]) function block is shown in Figure 7-2.
The main function of the GPIO is input and output data between the Data bus and the ports. Users could control
the PT2EN[1:0] and PT3EN[1:0] register flags to decide the input output direction. The input and output
function and the related functions are explained as follows:

Input:
GPIO Port 2 Bit1 and Bit0 (PT2[1:0]) could be the external interrupt ports as INT1 and INT0 or be the
general I/O ports. User should control INTE register E0IE and E1IE flags to decide if the interrupt is
enabled. The interrupt trigger mode is selected by E0M[1:0] and E1M[1:0] register flags. The input port
has a Schmitt trigger in it, and the up/down trigger voltage level is 0.45VDD/0.2VDD.
GPIO Port 3 Bit1 and Bit0 (PT3[1:0]) could be the external interrupt ports as INT3 and INT2 or be the
general I/O ports. User should control INTE register E2IE and E3IE flags to decide if the interrupt is
enabled. The interrupt trigger mode is selected by E2M[1:0] and E3M[1:0] register flags. The input port
has a Schmitt trigger in it, and the up/down trigger voltage level is 0.45VDD/0.2VDD.

Output
FS98O22 sends the digital data out by an embedded D Flip Flop. When the program sends data out
through PT2 or PT3, the data will be sent to data bus first, and then the D Flip Flop will latch the signal for
PT2/PT3 output while the Write signal and AR (FS98O22 internal device address pointer) is pointed to
PT2/PT3.

Pull up resistor
12
FS98O22 embeds an internal pull up resistor function in PT2 with about 1000k ohm resistor . Users
could control the PT2PU[1:0] register flags to decide the connections to pull up resistor. When a port is
connected to the pull up resistor, the input data is, by default, assigned to high (data 1).
12
The pull up current is about 10uA. Remember to disable PT1PU before program falls into Sleep mode.
Rev. 1.4
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FS98O22
Table 7-3 PT2 register table
06H
07H
24H
25H
26H
27H
28H
29H
2AH
Referenced
Bit 7
Section
INTF 3/6/7/9/10/11
INTE 3/6/7/9/10/11 GIE
PT2
7
PT2EN
7
PT2PU
7
PT2MR 7.2/7.5/8
-PT3
PT3EN
PT3PU
2BH
PT3MR
Bit 6
Bit 5
Bit 4
Bit 3 Bit 2
----PT2 [7:0]
PT2EN [7:0]
PT2PU [7:0]
-E1M[1:0]
PT3 [7:0]
PT3EN [7:0]
PT3PU [7:0]
PFOE
E3M[1:0]
N
Bit 1
Bit 0
E1IF
E1IE
E0IF
E0IE
E0M[1:0]
Value on Power on Reset
00000000
00000000
uuuuuuuu
00000000
00000000
00000000
uuuuuuuu
00000000
00000000
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Address Name
E2M[1:0]
00000000
Read data Operation
1.
2.
3.
13
Clear the PT2EN[n] /PT3EN[n] register flags. The PT2[n]/PT3[n] will be defined as an input port.
Set the PT2PU[n]/PT3PU[n] register as required. The PT2[n]/PT3[n] will be connected to an internal pull
up resistor.
After the signal input from outside, user could get the data through PT2[n]/PT3[n]
Write data Operation
1.
2.
3.
Set the PT2EN[n]/PT3EN[n] register flags. The PT2[n]/PT3[n] will be defined as an output port.
Set the PT2PU[n]/PT3PU[n] register as required. The PT2[n]/PT3[n] will be connected to an internal pull
up resistor.
Set the PT2[n]/PT3[n] to output the data. The embedded D Flip Flop will latch the data till PT2[n]/PT3[n]
is changed.
External Interrupt Operation (negative edge trigger for example)
1.
2.
3.
4.
5.
6.
Clear the PT2EN[n]/PT3EN[n] register flags. The PT2[n]/PT3[n] will be defined as an input port.
Set the PT2PU[n]/PT3PU[n] register. The PT2[n]/PT3[n] will be connected to an internal pull up resistor.
Set the E0M[1:0] as 00 to define INT0 interrupt trigger mode as “negative edge trigger”.
Set the E1M[1:0] as 00 to define INT1 interrupt trigger mode as “negative edge trigger”.
Set the E2M[1:0] as 00 to define INT2 interrupt trigger mode as “negative edge trigger”.
Set the E3M[1:0] as 00 to define INT3 interrupt trigger mode as “negative edge trigger”.
Notice Operation
1.
13
Parallel a small resistor (about 10k ohm) between ports and VDD to increase the possible output current
when the PT2PU[n]/PT3PU[n] is set.
n means the bits indexes user want to control
Rev. 1.4
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FS98O22
Digital I/O Port or PDM Output : PT2[2] and PT2[5]
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7.3.
Figure 7-3 PT2[2] function block
GPIO Port 2 Bit2 (PT2[2]) and GPIO Port 2 Bit5 (PT2[5]) function block is shown in Figure 7-3. The main
function of the GPIO is input and output data between the Data bus and the ports. User could control the
PT2EN[2]/ PT2EN[5] register flags to decide the input output direction. The input and output function and the
related functions are explained as follows:

Input:
GPIO Port 2 Bit2 (PT1[2]) and GPIO Port 2 Bit5 (PT1[5]) could be the PDM (Pulse Density Modulator)
output port or be the general I/O port. User should setup PM1EN/ PM2EN register flag to decide if the
PDM is enabled. The detailed PDM usage is described in Chapter 8.
The input port has a Schmitt trigger in it, and the up/down trigger voltage level is 0.45VDD/0.2VDD.

Output
FS98O22 sends the digital data out by an embedded D Flip Flop. When the program sends data out
through PT2, the data will be sent to data bus first, and then the D Flip Flop will latch the signal for PT2
output while the Write signal and AR (FS98O22 internal device address pointer) is pointed to PT2.

Pull up resistor
14
FS98O22 embeds an internal pull up resistor function in PT2 with about 1000k ohm resistor . Users
could control the PT2PU[2]/PT2PU[5] register flags to decide the connection to pull up resistor. When a
port is connected to the pull up resistor, the input data is, by default, assigned to high (data 1).
14
The pull up current is about 10uA. Remember to disable PT1PU before program falls into Sleep mode.
Rev. 1.4
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FS98O22
Table 7-4 PT2 register table
Address Name
24H
25H
26H
27H
PT2
PT2EN
PT2PU
PT2MR
Detail on
Chapter
7
7
7
7.2/7.5/8
Bit 7
--
Bit 6
Bit 5
PM2EN
Bit 4
Bit 3 Bit 2 Bit 1
PT2 [7:0]
PT2EN [7:0]
PT2PU [7:0]
PM1EN
--
Bit 0
--
Value on Power on
Reset
uuuuuuuu
00000000
00000000
00000000
Read data Operation
15
Clear the PT2EN[n] register flags. The PT2[n] will be defined as an input port.
Set the PT2PU[n] register as required. The PT2[n] will be connected to an internal pull up resistor.
After the signal input from outside, user could get the data through PT2[n]
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1.
2.
3.
Write data Operation
1.
2.
3.
Set the PT2EN[n] register flags. The PT2[n] will be defined as an output port.
Set the PT2PU[n] register as required. The PT2[n] will be connected to an internal pull up resistor.
Set the PT2[n] to output the data. The embedded D Flip Flop will latch the data till user change PT2[n].
Notice Operation
1.
Parallel a small resistor (about 10k ohm) between ports and VDD to increase the possible output current
when the PT2PU[n] is set.
7.4.
Digital I/O Port or I2C Serial Port : PT2[3]/SDA, PT2[4]/SCL
Figure 7-4 PT2[3] PT2[4] function block
GPIO Port 2 Bit4 and Bit 3 (PT2[4:3]) function block is shown in Figure 7-4. The main function of the GPIO is
input and output data between the Data bus and the ports. Users could control the PT2EN[4:3] register flags to
decide the input output direction. The input and output function and the related functions are explained as
follows:
15
n means the bits indexes user want to control
Rev. 1.4
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FS98O22

Input:
GPIO Port 2 Bit4 and Bit3 (PT2[4:3]) could be the I2C Module SCL and SDA ports or be the general I/O
ports. User should setup I2CEN register flag to decide the I2C Module is enabled or not. The detailed I2C
Module usage is described in Chapter 9.
The input port has a Schmitt trigger in it, and the up/down trigger voltage level is 0.45VDD/0.2VDD.

Output
FS98O22 sends the digital data out by an embedded D Flip Flop. When the program sends data out
through PT2, the data will be sent to data bus first, and then the D Flip Flop will latch the signal for PT2
output while the Write signal and AR (FS98O22 internal device address pointer) is pointed to PT2.
Pull up resistor
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
16
FS98O22 embeds an internal pull up resistor function in PT2 with about 1000k ohm resistor . User could
control the PT2PU[4:3] register flags to decide the connections to pull up resistor. When a port is
connected to the pull up resistor, the input data is, by default, assigned to high (data 1).

Open Drain Control
FS98O22 embeds an internal Open Drain Control function in PT2[4:3]. Users could control the
PT2OC[4:3] register flags to decide if the Open Drain Control function is enabled. When the user assigns
these 2 ports to be SCL and SDA, PT2OC[4:3] should be set. Please refer to Chapter 9.
Table 7-5 PT2 register table
Referenced
Bit 7
Section
PT2
7
PT2EN
7
PT2PU
7
PT2OC
9
B
Address Name
24H
25H
26H
37H
Bit 6
Bit 5
Bit 4
Bit 3
PT2 [7:0]
PT2EN [7:0]
PT2PU [7:0]
PT2OC[4:3]
Bit 2
Bit 1
Bit 0
Value on Power on
Reset
uuuuuuuu
00000000
00000000
uuu11uuu
Read data Operation
1.
2.
3.
4.
17
Clear the PT2EN[n] register flags. The PT2[n] will be defined as an input port.
Set the PT2PU[n] register as required. The PT2[n] will be connected to an internal pull up resistor.
Set the PT2OC[n] register as required. The PT2[n] will be connected to an internal pull low resistor.
After the signal input from outside, user could get the data through PT2[n]
Write data Operation
1.
2.
3.
4.
Set the PT2EN[n] register flags. The PT2[n] will be defined as an output port.
Set the PT2PU[n] register as required. The PT2[n] will be connected to an internal pull up resistor.
Set the PT2OC[n] register as required. The PT2[n] will be connected to an internal pull low resistor.
Set the PT2[n] to output the data. The embedded D Flip Flop will latch the data till PT2[n] is changed.
Notice Operation
1.
2.
16
17
Parallel a small resistor (about 10k ohm) between ports and VDD to enlarge the possible output current
when the PT2PU[n] is set.
The Pull up resistor function and the Open drain control function should NOT be enabled at the same
time.
The pull up current is about 10uA. Remember to disable PT1PU before program falls into Sleep mode.
n means the bit index that a user want to control
Rev. 1.4
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FS98O22
Digital I/O Port : PT2[6]
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7.5.
Figure 7-5 PT2[6] function block
GPIO Port 2 Bit 6 (PT2[6]) function block is shown in Figure 7-5. The main function of the GPIO is input and
output data between the Data bus and the ports. Users could control the PT2EN[6] register flags to decide the
input output direction. The input and output function are explained as follows:

Input:
GPIO Port 2 Bit 6 (PT2[6]) could only be the general I/O ports. The input port has a Schmitt trigger in it,
and the up/down trigger voltage level is 0.45VDD/0.2VDD.

Output
FS98O22 sends the digital data out by an embedded D Flip Flop. When the program sends data out
through PT2, the data will be sent to data bus first, and then the D Flip Flop will latch the signal for PT2
output while the Write signal and AR (FS98O22 internal device address pointer) is pointed to PT2.

Pull up resistor
18
FS98O22 embeds an internal pull up resistor function in PT2 with about 1000k ohm resistor . User could
control the PT2PU[6] register flags to set the connections to pull up resistor. When a port is connected to the
pull up resistor, the input data is, by default, assigned to high (data 1).
18
The pull up current is about 10uA. Remember to disable PT1PU before program falls into Sleep mode.
Rev. 1.4
82/146
FS98O22
Table 7-6 PT2 register table
Address
24H
25H
26H
27H
Referenced
Bit 7
Section
PT2
7
PT2EN
7
PT2PU
7
PT2MR
7.2/7.5/8 BZEN
Name
Bit 6
Bit 5
Bit 4
Bit 3
PT2 [7:0]
PT2EN [7:0]
PT2PU [7:0]
---
Bit 2
Bit 1
Bit 0
--
Value on Power on
Reset
uuuuuuuu
00000000
00000000
00000000
Read data Operation
19
Clear the PT2EN[n] register flags. The PT2[n] will be defined as an input port.
Set the PT2PU[n] register as required. The PT2[n] will be connected to an internal pull up resistor.
After the signal input from outside, user could get the data through PT2[n]
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1.
2.
3.
Write data Operation
1.
2.
3.
Set the PT2EN[n] register flags. The PT2[n] will be defined as an output port.
Set the PT2PU[n] register as required. The PT2[n] will be connected to an internal pull up resistor.
Set the PT2[n] to output the data. The embedded D Flip Flop will latch the data till PT2[n] is changed.
Notice Operation
1.
19
Parallel a small resistor (about 10k ohm) between ports and VDD to increase the possible output current
when the PT2PU[n] is set.
n means the bits indexes user want to control
Rev. 1.4
83/146
FS98O22
Digital I/O Port or Buzzer Output : PT2[7]
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7.6.
Figure 7-6 PT2[7] function block
GPIO Port 2 Bit2 (PT2[2]) function block is shown in Figure 7-6. The main function of the GPIO is input and
output data between the Data bus and the ports. Users could control the PT2EN[2] register flags to decide the
input output direction. The input and output function and the related functions are explained as follows:

Input:
GPIO Port 2 Bit2 (PT1[2]) could be the Buzzer output port or be the general I/O port. User should setup
BZEN register flag to decide if the Buzzer output is enabled. The detailed Buzzer usage is described in
Section 5.4.

Output
FS98O22 sends the digital data out by an embedded D Flip Flop. When the program sends data out
through PT2, the data will be sent to data bus first, and then the D Flip Flop will latch the signal for PT2
output while the Write signal and AR (FS98O22 internal device address pointer) is pointed to PT2.

Pull up resistor
20
FS98O22 embeds an internal pull up resistor function in PT2 with about 1000k ohm resistor . User could
control the PT2PU[2] register flags to set the connection to pull up resistor. When a port is connected to
the pull up resistor, the input data is, by default, assigned to high (data 1).
20
The pull up current is about 10uA. Remember to disable PT1PU before program falls into Sleep mode.
Rev. 1.4
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FS98O22
Table 7-7 PT2[7] register table
Referenced
Section
PT2
7
PT2EN
7
PT2PU
7
Address Name
24H
25H
26H
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
PT2 [7:0]
PT2EN [7:0]
PT2PU [7:0]
Value on Power on
Reset
uuuuuuuu
00000000
00000000
Read data Operation
21
Clear the PT2EN[n] register flags. The PT2[n] will be defined as an input port.
Set the PT2PU[n] register as required. The PT2[n] will be connected to an internal pull up resistor.
After the signal input from outside, user could get the data through PT2[n]
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1.
2.
3.
Write data Operation
1.
2.
3.
Set the PT2EN[n] register flags. The PT2[n] will be defined as an output port.
Set the PT2PU[n] register as required. The PT2[n] will be connected to an internal pull up resistor.
Set the PT2[n] to output the data. The embedded D Flip Flop will latch the data till PT2[n] is changed.
Buzzer Output Operation
1.
2.
3.
4.
Set the PT2EN[7] register flags. The PT2[7] will be defined as an output port.
Please refer to Section 5.4 for the Buzzer Clock setting.
Set the BZEN register flag. The PT2[7] will become the buzzer output port.
Connect a buzzer to PT2 bit7. The Buzzer will work correctly.
Notice Operation
1.
21
Parallel a small resistor (about 10k ohm) between ports and VDD to increase the possible output current
when the PT2PU[n] is set.
n means the bits indexes user want to control
Rev. 1.4
85/146
FS98O22
8.
PDM (Pulse Density Modulator) Module
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Please see Figure 8-1 and Figure 8-2. The GPIO port 2 bit 2 (PT2[2]) could be defined as either PDM module
output or General purpose I/O. User could control the PDMEN register flags to decide the definition. The PDM
module is the function FS98O22 uses for implementing the PWM (Pulse Width Modulation). Its working
flowchart and usage will be described in this Chapter. First of all, a user needs to setup the PMCS register flag
22
to decide the PDM CLK which is generated by a Frequency divider from the MCK . Then, the PDM CLK will be
divided into 16 internal clock signals named PDM15, PDM14,…, PDM0. Finally, the user should control the
PMD1 (PMD1H and PMD1L) register flag to do the combination of these 16 internal clock signals. For example,
if the PMD1 is set as 0x1228H, the output signal is assigned to be the combination of PDM12, PDM9, PDM5
and PDM3. If the PMD1 is set as 0x6000H, the output signal is assigned to be the combination of PDM14 and
PDM13 (please refer to the following figure).The PMD1 value could be assigned from 0 to 65535, and the
23
output signal duty cycle could be from 0 to 65535/65536 . For example, when user sets the PMD1 as 0x6000H
(24576), the equivalent PWM duty cycle is 24576/65536.
Figure 8-1 FS98O22 PDM module function block
22
Please refer to Chapter 5 for MCK detailed information.
The PDM couldn‟t generate signal as duty cycle 1, user needs to define the port as General purpose I/O
and keep it at high voltage level (data 1) manually to represent Duty Cycle 1.
23
Rev. 1.4
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FS98O22
PDM15
PDM14
PDM13
PDM12
…
…
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If PMD1 =
0x5000H
PDM out
If PMD1 =
0xC000H
PDM out
Figure 8-2 PDM module signal generation
Rev. 1.4
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FS98O22
Table 8-1 PDM module register table
Address
Name
27H
30H
31H
32H
33H
36H
PT2MR
PMD1H
PMD1L
PMD2H
PMD2L
PMCON
Referenced
Section
7.2/7.5/8
8
8
Bit 7
Bit 6
Bit 5
--
Bit 4
Bit 3
Bit 2
PM1EN
-PMD1[15:8]
PMD1[7:0]
PDMD2[15:8]
PDMD2[7:0]
PDMEN
8
Bit 1
Bit 0
--
PMCS[2:0]
Value on Power on
Reset
00000000
00000000
00000000
00000000
00000000
00000000
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Register PT2MR at address 27H
property
U-0
U-0
U-0
PT2MR
--
PM2EN
R/W-0
U-0
PM1EN
U-0
--
Bit7
Bit 6
U-0
U-0
--
Bit0
PM1EN: PT2[5] output multiplexer (Please refer to Section 7.3 for details)
1 = GPIO Port 2 bit 5 (PT2[5]) is defined as PDM output.
0 = GPIO Port 2 bit 5 (PT2[5]) is defined as GPIO.
Bit 4
PM1EN: PT2[2] output multiplexer (Please refer to Section 7.3 for details)
1 = GPIO Port 2 bit 2 (PT2[2]) is defined as PDM output.
0 = GPIO Port 2 bit 2 (PT2[2]) is defined as GPIO.
Property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
88/146
FS98O22
Register PMD1H at address 30H
property
R/W-0
R/W-0
R/W-0
PMD1H
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
PMD1[15:8]
Bit7
Bit0
Register PMD1L at address 31H
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
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property
PMD1L
PMD1[7:0]
Bit7
Bit 15-0
Bit0
PMD1[15:0]: PDM Module Data output Control Register
1
PMD1[15] = PDM15 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
2
PMD1[14] = PDM14 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
3
PMD1[13] = PDM13 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
4
PMD1[12] = PDM12 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
5
PMD1[11] = PDM11 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
6
PMD1[10] = PDM10 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
7
PMD1[9] = PDM9 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
8
PMD1[8] = PDM8 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
9
PMD1[7] = PDM7 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
10
PMD1[6] = PDM6 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
11
PMD1[5] = PDM5 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
12
PMD1[4] = PDM4 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
13
PMD1[3] = PDM3 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
14
PMD1[2] = PDM2 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
15
PMD1[1] = PDM1 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
16
PMD1[0] = PDM0 (PDM CLK/2 )Signal Combination enable flag. 0 = Enable ; 1 = Disable
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
89/146
FS98O22
Register PMD2H at address 30H
property
R/W-0
R/W-0
R/W-0
PMD2H
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
PMD2[15:8]
Bit7
Bit0
Register PMD2L at address 31H
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
R/W-0
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property
PMD2L
PMD2[7:0]
Bit7
Bit 15-0
Bit0
PMD2[15:0]: PDM Module Data output Control Register
PMD2[15] = PDM15 (PDM CLK/21)Signal Combination enable flag. 0 = Enable ; 1 = Disable
PMD2[14] = PDM14 (PDM CLK/22)Signal Combination enable flag. 0 = Enable ; 1 = Disable
PMD2[13] = PDM13 (PDM CLK/23)Signal Combination enable flag. 0 = Enable ; 1 = Disable
PMD2[12] = PDM12 (PDM CLK/24)Signal Combination enable flag. 0 = Enable ; 1 = Disable
PMD2[11] = PDM11 (PDM CLK/25)Signal Combination enable flag. 0 = Enable ; 1 = Disable
PMD2[10] = PDM10 (PDM CLK/26)Signal Combination enable flag. 0 = Enable ; 1 = Disable
PMD2[9] = PDM9 (PDM CLK/27)Signal Combination enable flag. 0 = Enable ; 1 = Disable
PMD2[8] = PDM8 (PDM CLK/28)Signal Combination enable flag. 0 = Enable ; 1 = Disable
PMD2[7] = PDM7 (PDM CLK/29)Signal Combination enable flag. 0 = Enable ; 1 = Disable
PMD2[6] = PDM6 (PDM CLK/210)Signal Combination enable flag. 0 = Enable ; 1 = Disable
PMD2[5] = PDM5 (PDM CLK/211)Signal Combination enable flag. 0 = Enable ; 1 = Disable
PMD2[4] = PDM4 (PDM CLK/212)Signal Combination enable flag. 0 = Enable ; 1 = Disable
PMD2[3] = PDM3 (PDM CLK/213)Signal Combination enable flag. 0 = Enable ; 1 = Disable
PMD2[2] = PDM2 (PDM CLK/214)Signal Combination enable flag. 0 = Enable ; 1 = Disable
PMD2[1] = PDM1 (PDM CLK/215)Signal Combination enable flag. 0 = Enable ; 1 = Disable
PMD2[0] = PDM0 (PDM CLK/216)Signal Combination enable flag. 0 = Enable ; 1 = Disable
Rev. 1.4
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FS98O22
Register PMCON at address 36H
property
U-0
U-0
U-0
PMCON
R/W-0
U-0
R/W-0
PDMEN
R/W-0
PMCS[2:0]
Bit7
Bit 4
R/W-0
Bit0
PDMEN: PDM Module enable flag (Please refer to Chapter 8 for details)
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1 = PDM Module is enabled, GPIO Port 2 bit 2 could be defined as PDM output.
0 = PDM Module is disabled, GPIO Port 2 bit 2 could be defined as GPIO.
Bit 2-0
PMCS[2:0]: PDM CLK frequency Selector
111 = PDM CLK frequency is as MCK/128
110 = PDM CLK frequency is as MCK/64
101 = PDM CLK frequency is as MCK/32
100 = PDM CLK frequency is as MCK/16
011 = PDM CLK frequency is as MCK/8
010 = PDM CLK frequency is as MCK/4
001 = PDM CLK frequency is as MCK/2
000 = PDM CLK frequency is the same as MCK
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
91/146
FS98O22
Table 8-2 PMD register table
Address
14H
25H
27H
Value on Power on
Reset
00000000
00000000
00000000
00000000
00000000
00000000
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30H
31H
36H
Detail on
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Chapter
MCK
5
M7_CK M6_CK M5_CK
M3_CK M2_CK M1_CK M0_CK
PT2EN
7
PT2EN [7:0]
PT2MR
PM1E
7.2/7.5/8
---N
PMD1H
8
PMD1[15:8]
PMD1L
8
PMD1[7:0]
PMCON
PDME
8
PMCS[2:0]
N
Name
PDM Operation
1.
2.
3.
4.
5.
6.
Setup M0_CK, M3_CK to decide the MCK.(Please refer to Section 5.1 for detailed instruction for setup)
Set PDMEN to enable the PDM Module.
Setup PMCS[2:0] to decide the PDM CLK frequency.
Setup PMD1[15:0] to decide the PDM output signal.
Set PT2EN[2] to assign the PT2[2] to be an output port.
Set PM1EN to assign the PT2[2] to be PDM Module output.
Table 8-3 PDM CLK selection table
Rev. 1.4
PWCS
PDM CLK frequency
000
MCK
001
MCK/2
010
MCK/4
011
MCK/8
100
MCK/16
101
MCK/32
110
MCK/64
111
MCK/128
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FS98O22
9.
I2C Module (slave mode only)
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FS98O22 embeds a slave mode I2C module. The two pins, SCL and SDA, are used to perform the I2C system.
The pin SCL is assigned to be the clock pin, and the pin SDA is assigned to be the data pin in the I2C module.
In an I2C system, there are master side and slave side. Master side would send the clock, slave ID and the
commands to slave side. One master could connect to several slave sides with different IDs. First of all, the
slave side would check if the ID sent by master side is the same as itself. If the ID matched, slave side would
check the following bit from master. If the bit was high, it means that master side want to transfer some data or
command to slave, so slave side should sent back an acknowledgement signal and then receive the data from
master side. On the other hand, if the bit was low, it means that master side want to receive the data from slave
side, so slave side should sent back an acknowledgement signal and then transmit the data back.( Please see
Figure 9-1)
Master to slave
Slave to master
….
Master
receive
data
Master
transmit
data
start
slave ID
R
ack
data
start
slave ID
R
ack
Data1
ack stop
ack
….
stop
Figure 9-1 FS98O22 I2C module communication
In the I2C module embedded in FS98O22, there are 5 register flags shown in following figure. The SCL and
SDA signal is connected to I2CSR and the Start and stop bit detector. The I2CSR is assigned to be the data
buffer. When some signal is sent from master, the Start and stop bit detector will respond to the situation, and
the Match detector will determine if the input data is matched with the slave ID. If it matches the ID, the user
should send back the acknowledgement (data high) to respond to the master side. No matter whether the I2C
module sends the data or receives the data, the I2CBUF is assigned to be the buffer. When the module
receives the data, the data signals will be stored in the I2CSR, and send the whole data to I2CBUF after the
data is sent completely.
Rev. 1.4
93/146
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FS98O22
Figure 9-2 I2C module function block
Rev. 1.4
94/146
FS98O22
Table 9-1 I2C module register table
Address
Name
57H
58H
59H
5AH
I2CCON
I2CSTA
I2CADD
I2CBUF
Referenced
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2
Section
9
WCOL I2COV I2CEN CKP
9
DA
P
S
RW
9
I2CADD [7:0]
9
I2CBUF [7:0]
Bit 1
Value on Power on
Reset
0001uuuu
uu0000u0
00000000
00000000
Bit 0
BF
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Register I2CCON at address 57H
property
R/W-0
R/W-0
R/W-0
R/W-1
I2CCON
WCOL
I2COV
I2CEN
CKP
U-X
U-X
U-X
Bit7
Bit 7
U-X
Bit0
WCOL: Write collision detector register flag.
1 = The I2CBUF register is written while it is still transmitting the previous data.
0 = No write collision is happened. This register should be clear in software.
Bit 6
I2COV: Receive overflow detector register flag
1 = A byte is received while theI2CBUF is still holding the previous data.
0 = No receive overflow is happened. This register should be clear in software
Bit 5
I2CEN: I2C module enable flag
1 = I2C module is enabled.
0 = I2C module is disabled.
Bit 4
CKP: SCK signal control register
1 = SCK pin is enabled.
0 = SCK pin is disabled and hold to low.
Property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
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FS98O22
Register I2CSTA at address 58H
property
U-X
U-X
I2CSTA
R/W-0
R/W-0
R/W-0
R/W-0
DA
P
S
RW
U-X
BF
Bit7
Bit0
DA: Data / Address bit register flag.
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Bit 5
R/W-0
1 = The last received byte is data.
0 = The last received byte is address.
Bit 4
P: Stop bit register flag
1 = A stop bit is detected.
0 = No stop bit is detected. When the I2C module is disabled, this bit would be clear.
Bit 3
S: Start bit register flag
1 = A start bit is detected.
0 = No start bit is detected. When the I2C module is disabled, this bit would be clear.
Bit 2
RW: Read / Write register flag
1 = Read command is detected.
0 = Write command is detected.
Bit 0
BF: I2CBUF full register flag.
1 = I2CBUF is full. The user could get data from I2CBUF register.
0 = I2CBUF is empty.
Register I2CADD at address 59H
property
R/W-0
R/W-0
R/W-0
I2CADD
R/W-0
R/W-0
R/W-0
R/W-0
I2CADD [7:0]
Bit7
Bit 7-0
R/W-0
Bit0
I2CADD[7:0]: I2C module slave mode ID buffer register.
Property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
96/146
FS98O22
Register I2CBUF at address 5AH
property
R/W-0
R/W-0
R/W-0
I2CBUF
R/W-0
R/W-0
R/W-0
R/W-0
I2CBUF [7:0]
Bit7
Bit0
I2CBUF[7:0]: I2C module Data buffer register.
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Bit 7-0
R/W-0
Property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X
= Bit
unknown
is
97/146
FS98O22
Table 9-2 I2C register table
Address
Referenced
Section
Bit 7
INTF 3/6/7/9/10/11
INTE 3/6/7/9/10/11 GIE
PT2OCB
9
I2CCON
9
WCOL
I2CSTA
9
I2CADD
9
I2CBUF
9
Bit 6
I2COV
Bit 5
I2CEN
DA
Bit 4
Bit 3
-I2CIF
-I2CIE
PT2OC[4:3]
CKP
P
S
I2CADD [7:0]
I2CBUF [7:0]
Bit 2
Bit 1
Bit 0
---
---
---
RW
BF
Value on
Power on
Reset
00000000
00000000
uuu11uuu
0001uuuu
uu0000u0
00000000
00000000
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06H
07H
37H
57H
58H
59H
5AH
Name
I2C data receive operation: (master to slave)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
Configure SCL and SDA pins as open-drain through the PTOCB[4:3]
Set I2CEN register flag to enable the I2C module.
Clear I2CIF to reset the I2C interrupt.
Set I2CIE and GIE to enable the I2C interrupt.
Wait for the interrupt.
When the I2C master device sends data to slave side, the data (ID) transmitted from the master device
will be sent to I2CBUF, and the BF register flag will be set.
If the RW register flag is set, the I2C module will enter the receive mode.
The acknowledgement signal will be sent automatically and an interrupt will occur.
Clear the I2CIF and reset the interrupt to wait for the interrupt happened again.
When an interrupt occurs, read the I2CBUF for receiving the data transmitted from master side. The
acknowledgement signal will be sent automatically.
If the user doesn‟t read the data from I2CBUF, the BF register flag will be held high. When the data is sent
to slave again, the I2COV register flag will be set, and the interrupt will NOT happen.
Figure 9-3 I2C waveform for reception
Rev. 1.4
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FS98O22
I2C data transmit operation:
1.
2.
3.
4.
5.
6.
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7.
8.
9.
Configure SCL and SDA pins as open-drain through the PTOCB[4:3].
Set I2CEN register flag to enable the I2C module.
Clear I2CIF to reset the I2C interrupt.
Set I2CIE and GIE to enable the I2C interrupt.
Wait for the interrupt.
When the I2C master device sends data to slave side, the data (ID) transmitted from the master device
will be sent to I2CBUF, and the BF register flag will be set.
If the RW register flag is clear, the I2C module will enter the transmit mode.
The acknowledgement signal will be sent automatically and the interrupt will happen.
Set the CKP register flag to hold the SCK to low, and then write the data, which is ready to send to master
side, to I2CBUF.
Clear the I2CIF and reset the interrupt to wait for the interrupt to happen again.
Clear the CKP register flag to enable the SCK pin. The master side will start to get the data.
When interrupt happen, the master side has already finished the transmission, the acknowledgement has
been sent back to salve side, and the BF register flag has been clear.
10.
11.
12.
Figure 9-4 I2C waveforms for transmission
Rev. 1.4
99/146
FS98O22
10. Analog Function Network
Please see Figure 10-1. FS98O22 Analog Function Network has 2 main functions: Low Noise OP Amplifier
(OPAMP) and Sigma Delta Analog to Digital Converter (ADC). OPAMP is used to amplify the input analog
signal for ADC. ADC is used to convert the analog signal to digital signal.
The OPAMP has 2 input ports as inverting side and non-inverting side. Users could setup SOP1P[2:0] and
SOP1N[1:0] to choose the input signals. S_CH1CK[1:0] and OP1EN register flags are used to control OPAMP
and OP1O is the OPAMP output port. The detailed operations will be described in Section 10.2.
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The embedded ADC contains sigma delta modulator and digital comb filter. It is a fully differential input
system. User could give 2 signals for differential reference and 2 signals for differential input. ADC will convert
the ratio of differential input to differential reference to 14-bit digital output. The related control instructions will
be illustrated in Section 10.1.
Figure 10-1 FS98O22 analog function network
Rev. 1.4
100/146
FS98O22
Table 10-1 analog function network register table
Address Name
INTF
INTE
ADOH
ADOL
ADOLL
ADCON
PCK
NETA
NETB
NETC
NETD
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
--ADIF
----ADIE
--ADO [15:8]
ADO [7:0]
Extra ADC output register
ADRST
ADM [2:0]
S_CH1CK [1:0]
--SINH[2:0]
SFTA[2:0]
SOP1N[1:0]
SVRL[1:0]
SVRH[1:0]
ADG[1:0]
ADEN
AZ
OP1EN
SOP1P[2:0]
Value on Power on
Reset
00000000
00000000
00000000
00000000
00000000
uuuu0000
00000000
00000000
00000000
00000000
00000000
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06H
07H
10H
11H
12H
13H
15H
18H
19H
1AH
1BH
Referenced
Bit 7
Bit 6
Section
3/6/7/9/10/11
3/6/7/9/10/11 GIE
10/11
10/11
10/11
10/11
4/5/7.5/10
-10/11
SINL[1:0]
10/11
10/11
SREFO
10/11
Rev. 1.4
101/146
FS98O22
Register ADOH at address 10H
Property
R-0
R-0
R-0
R-0
ADOH
R-0
R-0
R-0
R-0
ADO [15:8]
Bit7
Bit0
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Register ADOL at address 11H
property
R-0
R-0
R-0
R-0
ADOL
R-0
R-0
R-0
ADO [7:0]
Bit7
Bit 15-0
R-0
Bit0
ADO [15:0]: ADC Digital Output
ADO[15] = ADC Digital Output sign bit. 0 = Output is positive; 1 = Output is negative.
ADO[14] = ADC Digital Output sign bit. 0 = Output is positive; 1 = Output is negative.
ADO[13] = ADC Digital Output Data bit 13.
ADO[12] = ADC Digital Output Data bit 12.
ADO[11] = ADC Digital Output Data bit 11.
ADO[10] = ADC Digital Output Data bit 10.
ADO[9] = ADC Digital Output Data bit 9.
ADO[8] = ADC Digital Output Data bit 8.
ADO[7] = ADC Digital Output Data bit 7.
ADO[6] = ADC Digital Output Data bit 6.
ADO[5] = ADC Digital Output Data bit 5.
ADO[4] = ADC Digital Output Data bit 4.
ADO[3] = ADC Digital Output Data bit 3.
ADO[2] = ADC Digital Output Data bit 2.
ADO[1] = ADC Digital Output Data bit 1.
ADO[0] = ADC Digital Output Data bit 0.
Property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
102/146
FS98O22
Register ADOLL at address 12H
property
R-0
R-0
R-0
ADOLL
R-0
R-0
R-0
R-0
R-0
Extra ADC output register
Bit7
Bit0
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Users could take the value of 3 registers, ADOH, ADOL and ADOLL as 24 bits ADC output.
Register ADCON at address 13H
property
U-X
U-X
U-X
U-X
ADCON
R/W-0
R/W-0
ADRST
R/W-0
ADM [2:0]
Bit7
Bit 3
R/W-0
Bit0
ADRST: ADC comb filter enable register (Please refer to Section 10.1 for detail)
1 = ADC comb filter is enabled, ADC could work correctly.
0 = ADC comb filter is disabled, ADC digital output will be zero.
Bit 2-0
ADM [2:0]: ADC output rate selector
111 = ADC output rate is ADCF/8000
24
110 = ADC output rate is ADCF/8000
101 = ADC output rate is ADCF/4000
100 = ADC output rate is ADCF/2000
011 = ADC output rate is ADCF/1000
010 = ADC output rate is ADCF/500
001 = ADC output rate is ADCF/250
000 = ADC output rate is ADCF/125
property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
24
X = Bit is unknown
Please refer to Section 5.3 for ADCF information.
Rev. 1.4
103/146
FS98O22
Register PCK at address 15H
property
U-0
PCK
U-0
U-0
--
U-0
R/W-0
R/W-0
S_CH1CK [1:0]
U-0
U-0
--
--
Bit7
S_CH1CK [1:0]: OPAMP Control Register (Please refer to Section 10.2)
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Bit 3-2
Bit0
11 = The OPAMP Chopper mode is enabled, and the Chopper frequency is CLK/1000
10 = The OPAMP Chopper mode is enabled, and the Chopper frequency is CLK/500
01 = The OPAMP Chopper mode is disabled. OPAMP input operation mode is set to be “-Offset”.
00 = The OPAMP Chopper mode is disabled. OPAMP input operation mode is set to be “+Offset”.
Property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
104/146
FS98O22
Register NETA at address 18H
property
R/W-0
NETA
R/W-0
R/W-0
SINL[1:0]
R/W-0
R/W-0
R/W-0
SINH[2:0]
R/W-0
SFTA[2:0]
Bit7
Bit0
SINL[1:0]: ADC negative input port signal multiplexer (Please refer to Section 10.1)
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Bit 7-6
R/W-0
11 = The ADC negative input port is connected to TEMPL. (Please refer to Section 4.6)
10 = The ADC negative input port is connected to AIN3 (PT1[3]).
01 = The ADC negative input port is connected to AIN2 (PT1[2]).
00 = The ADC negative input port is connected to AIN1 (PT1[1]).
Bit 5-3
10.1)
SINH[2:0]: Embedded ADC Low Pass Filter input port signal multiplexer (Please refer to Section
111 = The ADC Low Pass Filter input port is connected to AGND. (Please refer to Section 4.4)
110 = The ADC Low Pass Filter input port is connected to AIN4 (PT1[4]).
101 = The ADC Low Pass Filter input port is connected to AIN5 (PT1[5]).
100 = The ADC Low Pass Filter input port is connected to TEMPH. (Please refer to Section 4.6)
input).
input).
011 = The ADC Low Pass Filter input port is connected to VRL (ADC referenced voltage negative
010 = The ADC Low Pass Filter input port is connected to VRH (ADC referenced voltage positive
001 = The ADC Low Pass Filter input port is connected to OP1P (OPAMP non-inverting input port).
000 = The ADC Low Pass Filter input port is connected to OP1O (OPAMP output port).
Bit 2
SFTA [2]: FTIN and FTB connector ( ADC Low Pass Filter enable flag)
1 = FTIN and FTB is short. ADC Low Pass Filter is enabled.
0 = FTIN and FTB is open. ADC Low Pass Filter is disabled.
Bit 1-0
SFTA [1:0]: ADC positive input port signal multiplexer (Please refer to Section 10.1)
11 = The ADC positive input port is connected to AIN3 (PT1[3]).
10 = The ADC positive input port is connected to AIN2 (PT1[2]).
01 = The ADC positive input port is connected to FTIN (SINH[2:0] multiplexer output port).
00 = The ADC positive input port is connected to FTB (FTIN output signal after Low Pass filter).
Property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
105/146
FS98O22
Register NETB at address 19H
property
U-0
U-0
NETB
R/W-0
R/W-0
SOP1N[1:0]
R/W-0
R/W-0
R/W-0
SVRL[1:0]
SVRH[1:0]
Bit7
Bit0
SOP1N[1:0]: OPAMP inverting input port signal multiplexer (Please refer to Section 10.2)
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Bit 5-4
R/W-0
11 = The OPAMP inverting input port is connected to AIN6 (PT1[3]).
10 = The OPAMP inverting input port is connected to AIN5 (PT1[5]).
01 = The OPAMP inverting input port is connected to AIN4 (PT1[4]).
00 = The OPAMP inverting input port is connected to OP1O (OPAMP output port).
Bit 3-2
10.1)
SVRL[1:0]: ADC reference voltage negative input port signal multiplexer (Please refer to Section
25
11 = The ADC negative referenced input port is connected to VR2P (1/5 REFO ).
10 = The ADC negative referenced input port is connected to AIN2 (PT1[2]).
01 = The ADC negative referenced input port is connected to AIN1 (PT1[1]).
00 = The ADC negative referenced input port is connected to AGND (Please refer to Section 4.4).
Bit 1-0
10.1)
SVRH[1:0]: ADC reference voltage positive input port signal multiplexer (Please refer to Section
11 = The ADC negative referenced input port is connected to VR2P (1/5 REFO).
10 = The ADC negative referenced input port is connected to VR1P (2/5 REFO).
01 = The ADC negative referenced input port is connected to AIN3 (PT1[3]).
00 = The ADC negative referenced input port is connected to AIN0 (PT1[0]).
Property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
25
X = Bit is unknown
Please refer to Section 4.6 for REFO detailed information
Rev. 1.4
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FS98O22
Register NETC at address 1AH
property
R/W-0
NETC
SREFO
U-0
U-0
U-0
R/W-0
R/W-0
ADG[1:0]
R/W-0
R/W-0
ADEN
AZ
Bit7
SREFO: Internal Reference Voltage enable flag. (Please refer to Section 10.1)
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Bit 7
Bit0
1 = Internal Reference Voltage is enabled. VR1P = 2/5 REFO, VR2P = 1/5 REFO
0 = Internal Reference Voltage is disabled. VR1P and VR2P are floating.
Bit 3-2
ADG[1:0]: Internal ADC input gain. (Please refer to Section 10.1)
11 = Internal ADC input gain is 7/3
10 = Internal ADC input gain is 2
01 = Internal ADC input gain is 1
00 = Internal ADC input gain is 2/3
Bit 1
ADEN: ADC enable flag. (Please refer to Section 10.1)
1 = ADC is enabled.
0 = ADC is disabled.
Bit 0
AZ: ADC differential input ports short controller. (Please refer to Section 10.1)
1 = ADC differential input ports are short and both connect to INL
26
(SINL output).
0 = ADC differential input ports are NOT short. The 2 ports connect to INH and INL.
Property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
X = Bit is unknown
26
That means the ADC input differential voltage is zero. ADC output should be zero counts. User could
measure ADC offset counts when the AZ register flag is set.
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FS98O22
Register NETD at address 1BH
property
U-0
U-0
U-0
NETD
U-0
R/W-0
R/W-0
OP1EN
R/W-0
SOP1P[2:0]
Bit7
Bit0
OP1EN: OPAMP enable flag. (Please refer to Section 10.2)
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Bit 3
R/W-0
1 = OPAMP is enabled.
0 = OPAMP is disabled.
Bit 2-0
10.2)
SOP1P[2:0]: OPAMP non-inverting input port signal multiplexer (Please refer to Section
111 = The OPAMP non-inverting input port is connected to AIN7 (PT1[7])
110 = The OPAMP non-inverting input port is connected to AIN6 (PT1[6])
101 = The OPAMP non-inverting input port is connected to AIN5 (PT1[5]).
100 = The OPAMP non-inverting input port is connected to AIN4 (PT1[4]).
011 = The OPAMP non-inverting input port is connected to AIN3 (PT1[3]).
010 = The OPAMP non-inverting input port is connected to AIN2 (PT1[2]).
001 = The OPAMP non-inverting input port is connected to AIN1 (PT1[1]).
000 = The OPAMP non-inverting input port is connected to AIN0 (PT1[0]).
Property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X
= Bit
unknown
is
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FS98O22
10.1. Analog to Digital Converter (ADC) :
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Please see Figure 10-2. ADC Module contains 3 main functions – Low Pass Filter, Sigma Delta Modulator and
Comb Filter. Before doing the AD conversion, User could reduce the low frequency noise by the embedded
Low Pass Filter. The SINH[2:0] register flags are used to choose the input signal. SFTA[2] flag is used to enable
the Filter. Sigma Delta Modulator and Comb Filter are used to complete the AD Converter. First of all the
Modulator will output serial bits to show the ratio of the difference between INH and INL to the difference
between VRH and VRL. For example, if the ratio of VRH and VRL to INH and INL is 7/10, the output bit series
will be 7 „bit1‟ every 10 bits in average. Comb Filter is used to increase the SNR(signal-noise ratio) and the real
ADC output, ADO, will be 14-bit precision in FS98O22.
Figure 10-2 FS98O22 ADC function block
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FS98O22
Table 10-2 ADC function register table
Address
06H
07H
Bit 5
--
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
--
--
ADIF
--
--
--
--
ADIE
--
--
ADO [15:8]
ADO [7:0]
ADRST
---SINH[2:0]
-SVRL[1:0]
ADG[1:0]
ADM [2:0]
M1_CK
-SFTA[2:0]
SVRH[1:0]
ADEN
AZ
Value on Power on
Reset
00000000
00000000
00000000
00000000
uuuu0000
00000000
00000000
00000000
00000000
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10H
11H
13H
14H
18H
19H
1AH
Referenced
Bit 7
Bit 6
Section
INTF 3/6/7/9/10/1
1
INTE 3/6/7/9/10/1
GIE
1
ADOH
10/11
ADOL
10/11
ADCON
10/11
MCK
5
--NETA
10/11
SINL[1:0]
NETB
10/11
NETC
10/11
SREFO
Name
ADC Operation
1.
2.
3.
4.
Operate as in Section 4.1 to get the VGG (2 times VDD or external Power Supply).
Operate as in Section 4.2 to get the VDDA (3.6V)
Operate as in Section 4.3 to enable the Analog Bias Circuit
Set SINH[2:0] and SFTA[2:0] to decide the ADC positive input port signal.(Table 10-3, 10-4 and 10-5)
Table 10-3 FTIN selection table
SINH[2:0]
FTIN
000
OP1O
001
OP1P
010
VRH
011
VRL
100
TEMPH
101
AIN5
110
AIN4
111
AGND
Table 10-4 FTB selection table
27
SFTA[2]
27
FTB
0
ADC Low Pass Filter is disabled
1
ADC Low Pass Filter is enabled
The input of ADC Low Pass Filter is FTIN, and the output is FTB
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FS98O22
Table 10-5 INH selection table
INH (ADC positive input port signal)
00
FTB
01
FTIN
10
AIN2
11
AIN3
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SFTA[1:0]
5.
Set SINL[1:0] to decide the ADC negative input port signal. (Table 10-6)
Table 10-6 INL selection table
6.
SINL[1:0]
INL (ADC negative input port signal)
00
AIN1
01
AIN2
10
AIN3
11
TEMPL
Set ADG[1:0] to decide the ADC input gain. (Table 10-7)
Table 10-7 ADG selection table
7.
8.
ADG[1:0]
ADC input gain
00
2/3
01
1
10
2
11
7/3
Set SREFO register flag to enable the VR1P and VR2P if needed. (VR1P = 2/5 REFO, VR2P = 1/5
REFO)
Set SVRH[1:0] to decide the ADC reference voltage positive input port signal. (Table 10-8)
Table 10-8 VRH selection table
9.
SVRH[1:0]
VRH (ADC reference voltage positive input)
00
AIN0
01
AIN3
10
VR1P
11
VR2P
Set SVRL[1:0] to decide the ADC reference voltage negative input port signal. (Table 10-9)
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FS98O22
Table 10-9 SVRL selection table
VRL (ADC reference voltage negative input)
00
AGND
01
AIN1
10
AIN2
11
VR2P
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SVRL[1:0]
10.
Set ADM[2:0] to decide the ADC output rate. (Table 10-10 and 10-11)
Table 10-10 ADC output rate selection table
ADM[2:0]
ADC Output Rate
000
ADCF/125
001
ADCF/250
010
ADCF/500
011
ADCF/1000
100
ADCF/2000
101
ADCF/4000
110
ADCF/8000
111
ADCF/8000
Table 10-11 ADC sample frequency selection table
11.
12.
13.
14.
15.
16.
M1_CK
ADC sample Frequency (ADCF)
0
MCK/25
1
MCK/50
Set ADIE and GIE register flags to enable the ADC interrupt
Set ADEN register flag, the embedded - modulator will be enabled.
Set ADRST register flag, the comb filter will be enabled.
When the ADC interrupt happen, read the ADO[15:0] to get the ADC output.(ADO[15:14] are signed bits)
Set AZ register flag to make the ADC positive and negative input port be internally short. Read the
ADO[15:0] to get the ADC offset (The ADO should be zero if the offset is zero)
Clear AZ register flag to make the ADC work normally.
Rev. 1.4
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FS98O22
10.2. OPAMP : OP1
Table 10-12 FS98O22 OPAMP register table
Address
Name
15H
19H
1BH
PCK
NETB
NETD
Referenced
Section
4/5/7.5/10
10/11
10/11
Bit 7
Bit 6
--
Bit 5
Bit 4
SOP1N[1:0]
Bit 3
Bit 2
Bit 1
Bit 0
S_CH1CK [1:0]
----OP1EN
SOP1P[2:0]
Value on Power on
Reset
00000000
00000000
00000000
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OPAMP Operation
1.
Set SOP1P[2:0] to decide the OPAMP non-inverting input port signal. (Table 10-13)
Table 10-13 OP1P selection table
2.
SOP1P[2:0]
OP1P (OPAMP non-inverting input)
000
AIN0
001
AIN1
010
AIN2
011
AIN3
100
AIN4
101
AIN5
110
AIN6
111
AIN7
Set SOP1N[1:0] to decide the OPAMP inverting input port signal. (Table 10-14)
Table 10-14 OP1N selection table
3.
SOP1N[1:0]
OP1N (OPAMP inverting input)
00
OP1O
01
AIN4
10
AIN5
11
AIN6
Set S_CH1CK[1:0] to decide the OPAMP chopper mode.(Please see Section 3.6 for details)
Rev. 1.4
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FS98O22
Table 10-15 chopper mode selection table
OPAMP chopper mode (input operation)
00
+Offset
01
-Offset
10
CLK/500 chopper frequency
11
CLK/1000 chopper frequency
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S_CH1CK[1:0]
4.
Set OP1EN to enable the OPAMP.
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FS98O22
11. ADC Application Guide
The ADC used in FS98O22 is a - ADC with fully differential inputs and fully differential reference voltage
inputs. Its maximum output is 15625. The conversion equation is as follows:
Dout  15625 * G *
G is ADC input gain. (refer to Section 10.1 ADC operation step 6)
VIH is ADC’s positive input voltage
VIL is ADC’s negative input voltage
Vio is ADC’s offset on the input terminals (Vio could be measured by using AZ register flag. See Section
11.4)
VRH is the voltage at the positive input of Reference Voltage
VRL is the voltage at the negative input of Reference Voltage
Vro is the offset on the input terminals of Reference Voltage (Generally speaking, Vro could be ignored)
The value (VRH-VRL+Vro) should be positive.
When G * (VIH-VIL+Vio) / (VRH-VRL+Vro)  1, Dout=15625
When G * (VIH-VIL+Vio) / (VRH-VRL+Vro)  -1, Dout=-15625
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



VIH - VIL  Vio
VRH - VRL  Vro






11.1. ADC Output Format
th
CPU can read ADO[14:0] as ADC‟s 15-bit output. Note that the output is in 2‟s complement format. The 14 bit
of ADO[14:0] is sign bit. When the sign bit is cleared, the ADC output denotes a positive number, When the sign
bit is set, the ADC output denotes a negative number.
Example:
ADO[15:0] = 0X257FH, then Dout = 9599.
ADO[15:0] = 0XE2F7H, then Dout = - (not (E2F7H) +1) = -7433.
11.2. ADC Linear Range
ADC is close to saturation when G * (VIH-VIL+Vio) / (VRH-VRL+Vro) is close to 1, and has good linearity in
the range of 0.95.
11.3. ADC Output Rate and Settling Time
ADC output is the results of sigma delta modulator and the comb filter. The analog input signal needs to be
28
sampled N times and processed by the ADC and then the user could get one digital output. Generally
speaking, the more times ADC samples the analog input signal, the more precise the digital output is.
When the user decides the sampling frequency and sampling counts, and then enables the ADC module, ADC
module will send out a 15-bit signed digital output data every sampling N times and trigger the ADC interrupt.
In fact, every ADC output includes previous 2*N times sampling results. Generally speaking, if ADC inputs,
reference voltage, ADG, AZ are switched, the previous two ADC digital outputs are normally unstable ones, the
third output and beyond are stable.
11.4. ADC Input Offset
ADC Input Offset Vio is NOT a constant. It drifts with temperature and common mode voltage at the inputs.
28
„N times‟ could be decided by setting ADM register flag (Please refer to Section 10.1).
FS98O22 ADC sampling frequency is decided by M1_CK( Please refer to Section 5.3).
Rev. 1.4
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FS98O22
To get a correct ADC result, Doff(ADC input offset digital output) should be deducted from the Dout. The
instruction is as follows:
1.
2.
3.
4.
Set AZ bit, and VIH and VIL will short. Dout will be 15625 *G * (Vio) / (VRH-VRL+Vro). It‟s called Doff.
Save Doff in memory, and then Clear AZ bit to restart the ADC module.
Pass the first 2 ADC interrupts for ignoring the unstable ADC result.
When measuring analog signal, Doff should be deducted.
11.5. ADC Digital Output
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The ADC digital output deducted by Doff is ADC Gain. The ADC Gain doesn‟t change as VDD changes. The
suggested values for common mode voltages at ADC input and reference voltage are 1V~2V.
ADC input gain could be set by ADG[1:0] register flag. Please see Section 10.1 for detail.
11.6. ADC Resolution
ADC resolution is mainly affected by the ADC sampling counts and the ADC reference voltage. Generally
speaking, the more times ADC samples the analog input signal, the more precise the digital output is. The ADC
sampling counts could be decided by ADM[2:0] register flag. The ADC digital output rolling counts versus
ADM[2:0] and Reference voltage table are shown as follows:

(VRH, VRL) =0.4V, (VIH, VIL) =0.2V, VRL=VIL=AGND. G=1
Table 11-1 ADC rolling counts versus ADM

ADM
000
001
010
011
100
101
110
Rolling counts
10
6
4
3
3
2
1
(VRH, VRL) =VR, (VIH, VIL) =1/2 VR, VRL=VIL=AGND. G=1 ADM=101
Table 11-2 ADC rolling counts versus VR
VR
0.05
0.1
0.2
0.3
0.4
0.6
0.8
1.0
Rolling counts
31
15
5
3
2
2
4
9
Rev. 1.4
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FS98O22
12. Low Noise Operation Amplifier Guide
The input noise of CMOS OPAMP is generally much larger than the one of a Bipolar OPAMP. Moreover,
the flick noise (1/f noise) of CMOS is a killer for low frequency small signal measurement. But the need for input
bias current in Bipolar OPAMP causes that some transducers can not be used. In general, bipolar process is
not good for highly integrated Ics. FS98O22 use special CMOS low noise circuit design, and under normal
conditions, the input noise is controlled under 1μVpp (0.1Hz~1Hz). FS98O22 is good for transducer
applications because there is no need to consider input bias current.
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Most of the input noise in CMOS OPAMP comes from input differential amplification. S_CHCK can be set
to switch the differential amplification: 00 for positive Offset Voltage, 01 for negative Offset voltage. When using
one clock pulse to switch input differential amplification, that is called chopper mode. In general, chopper
frequency is set between 1 kHz and 2 KHz.
Under chopper mode, the input noise peak-to-peak voltage in FS98O22 is less than 0.5μV (0.1Hz~1Hz).
But an equivalent input current of less than 100pA is generated, due to the effect of switching.
12.1. Single End Amplifier Application
Measurement of small signal usually takes consideration of the drifting of an OPAMP offset voltage. In the
Figure below, the negative input is connected to AGND. It is also possible to measure the ADC‟s negative input
and deduct this value; in order to correct the error caused by the Amplifier‟s offset voltage drifting. Because
AGND provides current output in applications, AIN1 is used as negative input measurement point to avoid
unnecessary voltage error.
OPAMP input offset is amplified by an amplifier then inputted to ADC. Too much amplification can cause
OPAMP output move beyond ADC linear operation range. Hence, under normal conditions, OPAMP
amplification should be less than 50 times.
Please see Figure 12-1 for example.
Figure 12-1 single end amplifier application example
Rev. 1.4
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FS98O22
12.2. Differential Amplifier
Measurement of differential signal is often used in bridge sensor applications. As shown in the
differential amplifier below, VS Pin is used as power input for bridge sensor, ADC reference voltage is
also from VS Pin after voltage division. When there is a small change in VS, ADC output does not
change. Connecting AIN2 to ADC negative input can adjust the zero point of bridge sensor. When
starting chopper mode, the amplification should be less than 100 times.
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Please see Figure 12-2 for example.
Figure 12-2 differential amplifier example
Rev. 1.4
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FS98O22
13. LCD Driver
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FS98O22 embeds a LCD driver. The control signal are COM1~COM4 and SEG1~SEG12. The user could set
the SEG register flags to drive a static or multiplexed LCD panel. FS98O22 LCD driver could drive up to 20
segments multiplexed with up to 4 commons. Please see Figure 13-1.
COM1~COM4
4X20 LCD
FS98O22
SEG1 ~ SEG20
Figure 13-1 LCD driver control block
FS98O22 LCD driver has 4 kinds of control mode: static, 1/2 duty, 1/3 duty and 1/4 duty. The control mode
depends on the LCD panel The user could setup LCD_DUTY[1:0] register flags to choose one. Take a 1/4 duty
control mode number LCD for example, if the user wants to show number 9 in LCD, the SEG 1 includes 4
commons as [1,0,1,1] and the SEG2 include 4 commons as [1,1,1,1]. Please see Figure 13-2.
Static mode
1/2 duty mode
1/3 duty mode
1/4 duty mode
Figure 13-2 LCD control mode
Rev. 1.4
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FS98O22
The LCD frame frequency could be setup by setting the LCDCKS[1:0] register flags. FS98O22 divides the LCD
Module input clock to get LCDCK. (Please see Table 13-1 and Table 13-2)
Table 13-1 LCD frame frequency selection table
LCDCKS [1:0]
LCD frame frequency (LCDCK)
LCD Input clock Frequency/8
01
LCD Input clock Frequency/16
10
LCD Input clock Frequency/32
11
LCD Input clock Frequency/64
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00
Table 13-2 LCD duty selection table
LCD_DUTY [1:0] Control
mode
Rev. 1.4
SEG 1 – SEG12
bit7
bit6
bit5
bit4
bit3
bit2
-
-
COM2 COM1
-
-
COM3 COM2 COM1
-
00
static
-
-
01
1/2
-
-
10
1/3
-
11
1/4
COM4
bit1
bit0
COM2 COM1
COM3 COM2 COM1
COM3 COM2 COM1 COM4 COM3 COM2 COM1
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FS98O22
LCDCK
COM1
1/4
duty
COM2
COM3
COM4
COM1
COM2
COM3
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1/3
duty
COM4
COM1
1/2
duty
COM2
COM3
COM4
COM1
static
COM2
COM3
COM4
Figure 13-3 LCD duty mode working cycle
Rev. 1.4
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FS98O22
FS98O22 LCD driver has 3 voltage bias ports, such as V1, V2 and V3, and 2 kinds of power mode: 1/3 bias
and 1/2 bias. Please see the following description to setup the LCD power system.
1/3 bias power system (Please see Figure 13-4 and 13-5)
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
Figure 13-4 1/3 bias LCD power system circuit connection example
1/4 duty, 1/3 bias
1/3duty, 1/3bias
Figure 13-5 1/3 bias LCD power system clock
Rev. 1.4
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FS98O22
1/2 bias power system (Please see Figure 13-6 and 13-17)
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
Figure 13-6 1/2 bias LCD power system circuit connection example
1/4 duty, 1/2 bias
1/3duty, 1/2bias
Figure 13-7 1/2 bias LCD power system clock
Rev. 1.4
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FS98O22
Table 13-3 FS98O22 LCD driver register table
Address
Bit 4
Value on Power
on Reset
SEG1 [3:0]
uuuuuuuu
SEG3 [3:0]
uuuuuuuu
SEG5 [3:0]
uuuuuuuu
SEG7 [3:0]
uuuuuuuu
SEG9 [3:0]
uuuuuuuu
SEG11 [3:0]
uuuuuuuu
SEG13 [3:0]
uuuuuuuu
SEG15 [3:0]
uuuuuuuu
SEG17 [3:0]
uuuuuuuu
SEG19 [3:0]
uuuuuuuu
LEVEL LCD_DUTY[1:0] ENPMPL
00000000
Bit 3
Bit 2
Bit 1
Bit 0
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40H
41H
42H
43H
44H
45H
46H
47H
48H
49H
54H
Referenced
Bit 7 Bit 6
Bit 5
Section
LCD1
13
SEG2 [3:0]
LCD2
13
SEG4 [3:0]
LCD3
13
SEG6 [3:0]
LCD4
13
SEG8 [3:0]
LCD5
13
SEG10 [3:0]
LCD6
13
SEG12 [3:0]
LCD7
13
SEG14 [3:0]
LCD8
13
SEG16 [3:0]
LCD9
13
SEG18 [3:0]
LCD10
13
SEG20 [3:0]
LCDENR
13
LCDCKS [1:0] LCDEN
Name
Register LCD1 at address 40H
property
R/W-X
R/W-X
LCD1
R/W-X
R/W-X
R/W-X
R/W-X
SEG2 [3:0]
R/W-X
SEG1 [3:0]
Bit7
Bit 7-4
R/W-X
Bit0
SEG2[3]: LCD driver control signal: SEG2 with COM4 data.
SEG2[2]: LCD driver control signal: SEG2 with COM3 data.
SEG2[1]: LCD driver control signal: SEG2 with COM2 data.
SEG2[0]: LCD driver control signal: SEG2 with COM1 data.
Bit 3-0
SEG1[3]: LCD driver control signal: SEG1 with COM4 data.
SEG1[2]: LCD driver control signal: SEG1 with COM3 data.
SEG1[1]: LCD driver control signal: SEG1 with COM2 data.
SEG1[0]: LCD driver control signal: SEG1 with COM1 data.
Property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
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FS98O22
Register LCD2 at address 41H
property
R/W-X
R/W-X
LCD2
R/W-X
R/W-X
R/W-X
R/W-X
SEG4 [3:0]
R/W-X
SEG3 [3:0]
Bit7
Bit0
SEG4[3]: LCD driver control signal: SEG4 with COM4 data.
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Bit 7-4
R/W-X
SEG4[2]: LCD driver control signal: SEG4 with COM3 data.
SEG4[1]: LCD driver control signal: SEG4 with COM2 data.
SEG4[0]: LCD driver control signal: SEG4 with COM1 data.
Bit 3-0
SEG3[3]: LCD driver control signal: SEG3 with COM4 data.
SEG3[2]: LCD driver control signal: SEG3 with COM3 data.
SEG3[1]: LCD driver control signal: SEG3 with COM2 data.
SEG3[0]: LCD driver control signal: SEG3 with COM1 data.
Register LCD3 at address 42H
property
R/W-X
R/W-X
LCD3
R/W-X
R/W-X
R/W-X
R/W-X
SEG6 [3:0]
R/W-X
SEG5 [3:0]
Bit7
Bit 7-4
R/W-X
Bit0
SEG6[3]: LCD driver control signal: SEG6 with COM4 data.
SEG6[2]: LCD driver control signal: SEG6 with COM3 data.
SEG6[1]: LCD driver control signal: SEG6 with COM2 data.
SEG6[0]: LCD driver control signal: SEG6 with COM1 data.
Bit 3-0
SEG5[3]: LCD driver control signal: SEG5 with COM4 data.
SEG5[2]: LCD driver control signal: SEG5 with COM3 data.
SEG5[1]: LCD driver control signal: SEG5 with COM2 data.
SEG5[0]: LCD driver control signal: SEG5 with COM1 data.
Property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
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FS98O22
Register LCD4 at address 43H
property
R/W-X
R/W-X
LCD4
R/W-X
R/W-X
R/W-X
R/W-X
SEG8 [3:0]
R/W-X
SEG7 [3:0]
Bit7
Bit0
SEG8[3]: LCD driver control signal: SEG8 with COM4 data.
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Bit 7-4
R/W-X
SEG8[2]: LCD driver control signal: SEG8 with COM3 data.
SEG8[1]: LCD driver control signal: SEG8 with COM2 data.
SEG8[0]: LCD driver control signal: SEG8 with COM1 data.
Bit 3-0
SEG7[3]: LCD driver control signal: SEG7 with COM4 data.
SEG7[2]: LCD driver control signal: SEG7 with COM3 data.
SEG7[1]: LCD driver control signal: SEG7 with COM2 data.
SEG7[0]: LCD driver control signal: SEG7 with COM1 data.
Register LCD5 at address 44H
property
R/W-X
R/W-X
LCD5
R/W-X
R/W-X
R/W-X
R/W-X
SEG10 [3:0]
R/W-X
SEG9 [3:0]
Bit7
Bit 7-4
R/W-X
Bit0
SEG10[3]: LCD driver control signal: SEG10 with COM4 data.
SEG10[2]: LCD driver control signal: SEG10 with COM3 data.
SEG10[1]: LCD driver control signal: SEG10 with COM2 data.
SEG10[0]: LCD driver control signal: SEG10 with COM1 data.
Bit 3-0
SEG9[3]: LCD driver control signal: SEG9 with COM4 data.
SEG9[2]: LCD driver control signal: SEG9 with COM3 data.
SEG9[1]: LCD driver control signal: SEG9 with COM2 data.
SEG9[0]: LCD driver control signal: SEG9 with COM1 data.
Property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
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FS98O22
Register LCD6 at address 45H
property
R/W-X
R/W-X
LCD6
R/W-X
R/W-X
R/W-X
R/W-X
SEG12 [3:0]
R/W-X
R/W-X
SEG11 [3:0]
Bit0
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Bit7
Bit 7-4
SEG12[3]: LCD driver control signal: SEG12 with COM4 data.
SEG12[2]: LCD driver control signal: SEG12 with COM3 data.
SEG12[1]: LCD driver control signal: SEG12 with COM2 data.
SEG12[0]: LCD driver control signal: SEG12 with COM1 data.
Bit 3-0
SEG11[3]: LCD driver control signal: SEG11 with COM4 data.
SEG11[2]: LCD driver control signal: SEG11 with COM3 data.
SEG11[1]: LCD driver control signal: SEG11 with COM2 data.
SEG11[0]: LCD driver control signal: SEG11 with COM1 data.
Property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
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FS98O22
Register LCDENR at address 54H
property
LCDENR
R/W-0
R/W-0
LCDCKS [1:0]
R/W-0
U-0
R/W-0
LCDEN
LEVEL
R/W-0
LCD_DUTY[1:0]
Bit7
Bit 7-6
R/W-0
R/W-0
ENPMPL
Bit0
LCDCKS[1:0]: LCD frame frequency selector
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11 = LCD frame frequency is assigned to be LCD input clock frequency/8
10 = LCD frame frequency is assigned to be LCD input clock frequency/16
01 = LCD frame frequency is assigned to be LCD input clock frequency/32
00 = LCD frame frequency is assigned to be LCD input clock frequency/64
Bit 5
LCDEN: LCD driver enable register flag
1 = The LCD driver is enabled. LCD clock is started
0 = The LCD driver is disabled. LCD clock is stopped
Bit 3
LEVEL: LCD driver voltage bias selector.
0 = LCD driver voltage bias is assigned to be 1/3 bias.
1 = LCD driver voltage bias is assigned to be 1/2 bias.
Bit 2-1
LCD_DUTY[1:0]: LCD driver control mode (SEG duty cycle)
11 = LCD driver control mode is assigned to be 1/4 duty cycle mode.
10 = LCD driver control mode is assigned to be 1/3 duty cycle mode.
01 = LCD driver control mode is assigned to be 1/2 duty cycle mode.
00 = LCD driver control mode is assigned to be static mode
Bit 0
ENPMPL: LCD driver charge pump enable register flag
1 = LCD driver charge pump is enabled.
0 = LCD driver charge pump is disabled.
Property
R = Readable bit
W = Writable bit
U = unimplemented bit
- n = Value at Power On
Reset
„1‟ = Bit is Set
„0‟ = Bit is Cleared
Rev. 1.4
X = Bit is unknown
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Table 13-4 LCD driver register table
Address
Name
Referenced
Section
14H
40H
41H
42H
43H
44H
45H
46H
47H
48H
49H
54H
MCK
LCD1
LCD2
LCD3
LCD4
LCD5
LCD6
LCD7
LCD8
LCD9
LCD10
LCDENR
5
13
13
13
13
13
13
13
13
13
13
13
Bit 7
Bit 6
Bit 5
Bit 4
-M5_CK
SEG2 [3:0]
SEG4 [3:0]
SEG6 [3:0]
SEG8 [3:0]
SEG10 [3:0]
SEG12 [3:0]
SEG14 [3:0]
SEG16 [3:0]
SEG18 [3:0]
SEG20 [3:0]
LCDCKS [1:0] LCDEN
Bit 2
Bit 1
M3_CK
Bit 0
-M1_CK M0_CK
SEG1 [3:0]
SEG3 [3:0]
SEG5 [3:0]
SEG7 [3:0]
SEG9 [3:0]
SEG11 [3:0]
SEG13 [3:0]
SEG15 [3:0]
SEG17 [3:0]
SEG19 [3:0]
LEVEL LCD_DUTY[1:0] ENPMPL
Value on
Power on
Reset
00000000
uuuuuuuu
uuuuuuuu
uuuuuuuu
uuuuuuuu
uuuuuuuu
uuuuuuuu
uuuuuuuu
uuuuuuuu
uuuuuuuu
uuuuuuuu
00000000
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--
Bit 3
LCD operation
1.
2.
3.
4.
Connect the 20 segment ports and 4 common ports to LCD panel.
Setup LEVEL register flag to decide the LCD driver power system. (0 = 1/3 bias, 1 = 1/2 bias)
Set ENPMPL to enable the LCD charge pump.
Setup M0_CK,M1_CK,M3_CK and M5_CK to decide the LCD input clock frequency.(Refer to Section
5.7)
Table 13-5 CLK selection table
M1_CK
CLK
0
MCK
1
MCK/4
Table 13-6 MCK selection table
M3_CK
M0_CK
MCK
X
0
ICK
0
1
ECK
1
1
ECK/2
Table 13-7 TMCLK selection table
M5_CK
TMCLK (Timer and LCD Module input Clock)
0
CLK/1000
1
ECK/32
5. Setup LCDCKS[1:0] register flags to decide the LCD Clock frequency.
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FS98O22
Table 13-8 LCD frame frequency selection table
LCDCKS [1:0]
LCD frame frequency (LCDCK)
LCD Input clock Frequency/8
01
LCD Input clock Frequency/16
10
LCD Input clock Frequency/32
11
LCD Input clock Frequency/64
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00
6.
Setup LCD_DUTY[1:0] register flag to decide the control mode.(SEG duty cycle)
Table 13-9 LCD duty control mode selection table
7.
LCD_DUTY [1:0]
Control mode
00
static
01
1/2
10
1/3
11
1/4
Set LCDEN to enable the LCD driver.
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FS98O22
14. Halt and Sleep Modes
FS98O22 supports low power working mode. When the user want FS98O22 to do nothing and just stand by,
FS98O22 could be set to Halt mode or Sleep mode to reduce the power consumption by stopping the CPU
core working. The two modes will be described below.

Halt Mode
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After CPU executes a Halt command, CPU Program Counter (PC) stops counting until an interrupt command is
issued. To avoid program errors caused by Interrupt Return, it is suggested to add a NOP command after Halt
to guarantee the program‟s normal execution when turning back.

Sleep Mode
After CPU executes Sleep command, all oscillators stop working until an external interrupt command is issued
or the CPU is reset. To avoid program errors caused by Interrupt return, it is suggested to add a NOP command
after Sleep to guarantee the program‟s normal execution. The sleep mode power consumption is about 3 uA.
To make sure that CPU consumes minimum power in Sleep mode, it is necessary to close all power blocks and
analog circuits before issuing the Sleep command, and make sure that all I/O Ports are in VDD or VSS voltage
levels.
It is recommended that users execute the following program before issuing the Sleep command:
CLRF NETA
; As Reset state
CLRF NETB
; As Reset state
CLRF NETC
; As Reset state
CLRF NETD
; As Reset state
CLRF NETE
; As Reset state
CLRF NETF
CLRF PT1PU
; Pull up resistor is disconnected
CLRF PT1EN
; PT1[7:0] is assigned to be input ports.
CLRF AINENB
; Set PT1 as Analog Input Pin
MOVLW
MOVWF
interrupt)
01h
PT2PU
MOVLW
0Feh
MOVWF
PT2EN
; PT2 Pull up resistor is disconnected except port 0(external
; PT2 ports are assigned to be output ports except port 0
CLRF PT2
; Set PT2 [7:1] Output Low
CLRF INTF
; Clear the interrupt flags
MOVLW
081h
MOVWF
INTE
SLEEP
NOP
wakes up.
Rev. 1.4
; As Reset state
; Enable the external interrupt
; Set the FS98O22 into Sleep mode
; Guarantee that the program works normally when CPU
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FS98O22
Instruction Set
The FS98O22 instruction set consists of 37 instructions. Each instruction could be converted to 16-bit
OPCODE. The detailed descriptions are shown in the following sections.
14.1. Instruction Set Summary
Table 14-1 FS98O22 instruction set table
Operation
[W]  [W] + k
[PC]  [PC] + 1 + [W]
[Destination]  [f] + [W]
[Destination]  [f] + [W] + C
[W]  [W] AND k
[Destination]  [W] AND [f]
[f<b>]  0
[f<b>]  1
Skip if [f<b>] = 0
Skip if [f<b>] = 1
Push PC + 1 and GOTO k
[f]  0
Clear watch dog timer
[f]  NOT([f])
[Destination]  [f] -1
[Destination]  [f] -1, skip if the result is zero
PC  k
CPU Stop
[Destination]  [f] +1
[Destination]  [f] + 1, skip if the result is
zero
[W]  [W] | k
[Destination]  [W] | [f]
[W]  [f]
[W]  k
[f]  [W]
No operation
Pop PC and GIE = 1
RETURN and W = k
Pop PC
[Destination<n+1>]  [f<n>]
[Destination<n-1>]  [f<n>]
Stop OSC
[W]  k – [W]
[Destination]  [f] – [W]
‧
[Destination]  [f] – [W] –C
[W]  [W] XOR k
[Destination]  [W] XOR [f]
Cycle
1
2
1
1
1
1
1
1
1, 2
1, 2
2
1
1
1
1
1, 2
2
1
1
1, 2
C, DC, Z
None
C, DC, Z
C, DC, Z
Z
Z
None
None
None
None
None
Z
None
Z
Z
None
None
None
Z
None
Flag
1
1
1
1
1
1
2
2
2
1
1
1
1
1
1
Z
Z
None
None
None
None
None
None
None
C,Z
C, Z
PD
C, DC, Z
C, DC, Z
C, DC, Z
1
1
Z
Z
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Instruction
ADDLW k
ADDPCW
ADDWF f, d
ADDWFC f, d
ANDLW k
ANDWF f, d
BCF f, b
BSF f, b
BTFSC f, b
BTFSS f, b
CALL k
CLRF f
CLRWDT
COMF f, d
DECF f, d
DECFSZ f, d
GOTO k
HALT
INCF f, d
INCFSZ f, d
IORLW k
IORWF f, d
MOVFW f
MOVLW k
MOVWF f
NOP
RETFIE
RETLW k
RETURN
RLF f, d
RRF f, d
SLEEP
SUBLW k
SUBWF f, d
SUBWFC f, d
XORLW k
XORWF f, d
Rev. 1.4
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FS98O22
Note:
f: memory address (00h ~ 7Fh).
W: work register.
k: literal field, constant data or label.
d: destination select: d=0 store result in W, d=1: store result in memory address f.
b: bit select (0~7).
[f]: the content of memory address f.
PC: program counter.
C: Carry flag
DC: Digit carry flag
Z: Zero flag
PD: power down flag
TO: watchdog time out flag
WDT: watchdog timer counter
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












Rev. 1.4
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FS98O22
14.2. Instruction Description
(By alphabetically)
ADDLW
Syntax
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Operation
Flag Affected
Description
Cycle
Example:
ADDLW 08h
Add Literal to W
ADDLW
k
0  k  FFh
[W]  [W] + k
C, DC, Z
The content of Work register add literal “k” in Work register
1
Before instruction:
W = 08h
After instruction:
W = 10h
ADDPCW
Syntax
Operation
Flag Affected
Description
Cycle
Example 1:
ADDPCW
Example 2:
ADDPCW
Example 3:
ADDPCW
Add W to PC
ADDPCW
[PC]  [PC] + 1 + [W], [W] < 79h
[PC]  [PC] + 1 + ([W] – 100h), otherwise
None
The relative address PC + 1 + W are loaded into PC.
2
Before instruction:
W = 7Fh, PC = 0212h
After instruction:
PC = 0292h
Before instruction:
W = 80h, PC = 0212h
After instruction:
PC = 0193h
Before instruction:
W = Feh, PC = 0212h
After instruction:
PC = 0211h
Add W to f
ADDWF
f, d
0  f  FFh
d  [0,1]
Operation
[Destination]  [f] + [W]
Flag Affected
C, CD, Z
Description
Add the content of the W register and [f]. If d is 0, the result is stored in the W register.
If d is 1, the result is stored back in f.
Cycle
1
Example 1:
Before instruction:
ADDWF OPERAND, 0
OPERAND = C2h
W = 17h
After instruction:
OPERAND = C2h
W = D9h
Example 2:
Before instruction:
ADDWF OPERAND, 1
OPERAND = C2h
W = 17h
After instruction:
OPERAND = D9h
W = 17h
ADDWF
Syntax
Rev. 1.4
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FS98O22
Add W, f and Carry
ADDWFC f, d
0  f  FFh
d  [0,1]
Operation
[Destination]  [f] + [W] + C
Flag Affected
C, DC, Z
Description
Add the content of the W register, [f] and Carry bit.
If d is 0, the result is stored in the W register.
If d is 1, the result is stored back in f.
Cycle
1
Example
Before instruction:
ADDWFC OPERAND,1 C = 1
OPERAND = 02h
W = 4Dh
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ADDWFC
Syntax
After instruction:
C=0
OPERAND = 50h
W = 4Dh
ANDLW
Syntax
Operation
Flag Affected
Description
Cycle
Example:
ANDLW 5Fh
ANDWF
Syntax
Operation
Flag Affected
Description
Cycle
Example 1:
ANDWF OPERAND,0
Example 2:
ANDWF OPERAND,1
Rev. 1.4
AND literal with W
ANDLW
k
0  k  FFh
[W]  [W] AND k
Z
AND the content of the W register with the eight-bit literal “k”.
The result is stored in the W register.
1
Before instruction:
W = A3h
After instruction:
W = 03h
AND W and f
ANDWF
f, d
0  f  FFh
d  [0,1]
[Destination]  [W] AND [f]
Z
AND the content of the W register with [f].
If d is 0, the result is stored in the W register.
If d is 1, the result is stored back in f.
1
Before instruction:
W = 0Fh, OPERAND = 88h
After instruction:
W = 08h, OPERAND = 88h
Before instruction:
W = 0Fh, OPERAND = 88h
After instruction:
W = 88h, OPERAND = 08h
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FS98O22
BCF
Syntax
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Operation
Flag Affected
Description
Cycle
Example:
BCF FLAG, 2
Bit Clear f
BCF
f, b
0  f  FFh
0b7
[f<b>]  0
None
Bit b in [f] is reset to 0.
1
Before instruction:
FLAG = 8Dh
After instruction:
FLAG = 89h
BSF
Syntax
Operation
Flag Affected
Description
Cycle
Example:
BSF FLAG, 2
Bit Set f
BSF
f, b
0  f  FFh
0b7
[f<b>]  1
None
Bit b in [f] is set to 1.
1
Before instruction:
FLAG = 89h
After instruction:
FLAG = 8Dh
Bit Test skip if Clear
BTFSC
f, b
0  f  FFh
0b7
Operation
Skip if [f<b>] = 0
Flag Affected
None
Description
If bit „b‟ in [f] is 0, the next fetched instruction is discarded and a NOP is executed
instead making it a two-cycle instruction.
Cycle
1, 2
Example:
Before instruction:
Node BTFSC FLAG, PC = address (Node)
2
After instruction:
OP1
:
If FLAG<2> = 0
OP2
:
PC = address(OP2)
If FLAG<2> = 1
PC = address(OP1)
BTFSC
Syntax
Bit Test skip if Set
BTFSS
f, b
0  f  FFh
0b7
Operation
Skip if [f<b>] = 1
Flag Affected
None
Description
If bit „b‟ in [f] is 1, the next fetched instruction is discarded and a NOP is executed
instead making it a two-cycle instruction.
Cycle
1, 2
Example:
Before instruction:
Node BTFSS FLAG, PC = address (Node)
2
After instruction:
OP1
:
If FLAG<2> = 0
OP2
:
PC = address(OP1)
If FLAG<2> = 1
PC = address(OP2)
BTFSS
Syntax
Rev. 1.4
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FS98O22
CALL
Syntax
Operation
Flag Affected
Description
Cycle
Clear f
CLRF
f
0  f  255
[f]  0
None
Reset the content of memory address f
1
Before instruction:
WORK = 5Ah
After instruction:
WORK = 00h
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CLRF
Syntax
Subroutine CALL
CALL
k
0  k  1FFFh
Push Stack
[Top Stack]  PC + 1
PC  k
None
Subroutine Call. First, return address PC + 1 is pushed onto the stack. The immediate
address is loaded into PC.
2
Operation
Flag Affected
Description
Cycle
Example:
CLRF WORK
CLRWDT
Syntax
Operation
Flag Affected
Description
Cycle
Example:
CLRWDT
Clear watch dog timer
CLRWDT
Watch dog timer counter will be reset
None
CLRWDT instruction will reset watch dog timer counter.
1
After instruction:
WDT = 0
COMF
Syntax
Complement f
COMF
f, d
0  f  255
d  [0,1]
[f]  NOT([f])
Z
[f] is complemented. If d is 0, the result is stored in the W register. If d is 1, the result is
stored back in [f]
1
Before instruction:
W = 88h, OPERAND = 23h
After instruction:
W = DCh, OPERAND = 23h
Before instruction:
W = 88h, OPERAND = 23h
After instruction:
W = 88h, OPERAND = DCh
Operation
Flag Affected
Description
Cycle
Example 1:
COMF OPERAND,0
Example 2:
COMF OPERAND,1
Rev. 1.4
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DECF
Syntax
Operation
Flag Affected
Description
FO
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Cycle
Example 1:
DECF OPERAND,0
Decrement f
DECF
f, d
0  f  255
d  [0,1]
[Destination]  [f] -1
Z
[f] is decremented. If d is 0, the result is stored in the W register. If d is 1, the result is
stored back in [f].
1
Before instruction:
W = 88h, OPERAND = 23h
After instruction:
W = 22h, OPERAND = 23h
Before instruction:
W = 88h, OPERAND = 23h
After instruction:
W = 88h, OPERAND = 22h
Example 2:
DECF OPERAND,1
Decrement f, skip if zero
DECFSZ f, d
0  f  FFh
d  [0,1]
Operation
[Destination]  [f] -1, skip if the result is zero
Flag Affected
None
Description
[f] is decremented. If d is 0, the result is stored in the W register. If d is 1, the result is
stored back in [f].
If the result is 0, then the next fetched instruction is discarded and a NOP is
executed instead making it a two-cycle instruction.
Cycle
1, 2
Example:
Before instruction:
Node
DECFSZ PC = address (Node)
FLAG, 1
After instruction:
OP1
:
[FLAG] = [FLAG] – 1
OP2
:
If [FLAG] = 0
PC = address(OP1)
If [FLAG]  0
PC = address(OP2)
DECFSZ
Syntax
GOTO
Syntax
Operation
Flag Affected
Description
Cycle
HALT
Syntax
Operation
Flag Affected
Description
Cycle
Rev. 1.4
Unconditional Branch
GOTO
k
0  k  1FFFh
PC  k
None
The immediate address is loaded into PC.
2
Stop CPU Core Clock
HALT
CPU Stop
None
CPU clock is stopped. Oscillator is running. CPU can be waked up by internal and
external interrupt sources.
1
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INCF
Syntax
Operation
Flag Affected
Description
FO
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Cycle
Example 1:
INCF OPERAND,0
Increment f
INCF
f, d
0  f  FFh
d  [0,1]
[Destination]  [f] +1
Z
[f] is incremented. If d is 0, the result is stored in the W register. If d is 1, the result is
stored back in [f].
1
Before instruction:
W = 88h, OPERAND = 23h
After instruction:
W = 24h, OPERAND = 23h
Before instruction:
W = 88h, OPERAND = 23h
After instruction:
W = 88h, OPERAND = 24h
Example 2:
INCF OPERAND,1
Increment f, skip if zero
INCFSZ
f, d
0  f  FFh
d  [0,1]
Operation
[Destination]  [f] + 1, skip if the result is zero
Flag Affected
None
Description
[f] is incremented. If d is 0, the result is stored in the W register. If d is 1, the result is
stored back in [f].
If the result is 0, then the next fetched instruction is discarded and a NOP is
executed instead making it a two-cycle instruction.
Cycle
1, 2
Example:
Before instruction:
Node INCFSZ FLAG, PC = address (Node)
1
After instruction:
OP1
:
[FLAG] = [FLAG] + 1
OP2
:
If [FLAG] = 0
PC = address(OP2)
If [FLAG]  0
PC = address(OP1)
INCFSZ
Syntax
IORLW
Syntax
Operation
Flag Affected
Description
Cycle
Example:
IORLW
Rev. 1.4
85h
Inclusive OR literal with W
IORLW
k
0  k  FFh
[W]  [W] | k
Z
Inclusive OR the content of the W register and the eight-bit literal “k”. The result is
stored in the W register.
1
Before instruction:
W = 69h
After instruction:
W = Edh
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Inclusive OR W with f
IORWF
f, d
0  f  FFh
d  [0,1]
Operation
[Destination]  [W] | [f]
Flag Affected
Z
Description
Inclusive OR the content of the W register and [f]. If d is 0, the result is stored in the W
register. If d is 1, the result is stored back in [f].
Cycle
1
Example:
Before instruction:
IORWF OPERAND,1
W = 88h, OPERAND = 23h
After instruction:
W = 88h, OPERAND = Abh
FO
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IORWF
Syntax
Move f to W
MOVFW
f
0  f  FFh
Operation
[W]  [f]
Flag Affected
None
Description
Move data from [f] to the W register.
Cycle
1
Example:
Before instruction:
MOVFW OPERAND
W = 88h, OPERAND = 23h
After instruction:
W = 23h, OPERAND = 23h
MOVFW
Syntax
MOVLW
Syntax
Operation
Flag Affected
Description
Cycle
Example:
MOVLW
23h
Move literal to W
MOVLW
k
0  k  FFh
[W]  k
None
Move the eight-bit literal “k” to the content of the W register.
1
Before instruction:
W = 88h
After instruction:
W = 23h
Move W to f
MOVWF f
0  f  FFh
Operation
[f]  [W]
Flag Affected
None
Description
Move data from the W register to [f].
Cycle
1
Example:
Before instruction:
MOVWF OPERAND
W = 88h, OPERAND = 23h
After instruction:
W = 88h, OPERAND = 88h
MOVWF
Syntax
NOP
Syntax
Operation
Flag Affected
Description
Cycle
Rev. 1.4
No Operation
NOP
No Operation
None
No operation. NOP is used for one instruction cycle delay.
1
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RETFIE
Syntax
Operation
Flag Affected
Description
Cycle
Return and move literal to W
RETLW
k
0  k  FFh
[W]  k
[Top Stack] => PC
Pop Stack
None
Move the eight-bit literal “k” to the content of the W register. The program counter is
loaded from the top stack, then pop stack.
2
FO
Fo P R
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RETLW
Syntax
Return from Interrupt
RETFIE
[Top Stack] => PC
Pop Stack
1 => GIE
None
The program counter is loaded from the top stack, then pop stack. Setting the GIE bit
enables interrupts.
2
Operation
Flag Affected
Description
Cycle
Return
Syntax
Operation
Flag Affected
Description
Cycle
RLF
Syntax
Operation
Flag Affected
Description
Cycle
Example:
RLF OPERAND, 1
Rev. 1.4
Return from Subroutine
RETURN
[Top Stack] => PC
Pop Stack
None
The program counter is loaded from the top stack, then pop stack.
2
Rotate left [f] through Carry
RLF
f, d
0  f  FFh
d  [0,1]
[Destination<n+1>]  [f<n>]
[Destination<0>]  C
C  [f<7>]
C, Z
[f] is rotated one bit to the left through the Carry bit. If d is 0, the result is
stored in the W register. If d is 1, the result is stored back in [f].
1
Before instruction:
C=0
W = 88h, OPERAND = E6h
After instruction:
C=1
W = 88h, OPERAND = CCh
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RRF
Syntax
Operation
FO
Fo P R
r R ro TU
ef pe NE
er rti
'
en es
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O
nl
y
Flag Affected
Description
Rotate right [f] through Carry
RRF
f, d
0  f  FFh
d  [0,1]
[Destination<n-1>]  [f<n>]
[Destination<7>]  C
C  [f<7>]
C
[f] is rotated one bit to the right through the Carry bit. If d is 0, the result is
stored in the W register. If d is 1, the result is stored back in [f].
Cycle
Example:
RRF OPERAND, 0
1
Before instruction:
C=0
OPERAND = 95h
After instruction:
C=1
W = 4Ah, OPERAND = 95h
SLEEP
Syntax
Operation
Flag Affected
Description
Cycle
Oscillator stop
SLEEP
CPU oscillator is stopped
PD
29
CPU oscillator is stopped. CPU can be waked up by external interrupt sources.
1
SUBLW
Syntax
Subtract W from literal
SUBLW
k
0  k  FFh
[W]  k – [W]
C, DC, Z
Subtract the content of the W register from the eight-bit literal “k”. The result is stored
in the W register.
1
Before instruction:
W = 01h
After instruction:
W = 01h
C=1
Z=0
Before instruction:
W = 02h
After instruction:
W = 00h
C=1
Z=1
Before instruction:
W = 03h
After instruction:
W = FFh
C=0
Z=0
Operation
Flag Affected
Description
Cycle
Example 1:
SUBLW 02h
Example 2:
SUBLW 02h
Example 3:
SUBLW 02h
29
Please make sure all interrupt flags are cleared before running SLEEP; "NOP" command must follow HALT and
SLEEP commands.
Rev. 1.4
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FS98O22
Subtract W from f
SUBWF
f, d
0  f  FFh
d  [0,1]
Operation
[Destination]  [f] – [W]
Flag Affected
C, DC, Z
Description
Subtract the content of the W register from [f]. If d is 0, the result is stored in the W
register. If d is 1, the result is stored back in [f],
Cycle
1
Example 1:
Before instruction:
SUBWF
OPERAND, OPERAND = 33h, W = 01h
1
After instruction:
OPERAND = 32h
C=1
Z=0
Example 2:
Before instruction:
SUBWF
OPERAND, OPERAND = 01h, W = 01h
1
After instruction:
OPERAND = 00h
C=1
Z=1
Example 3:
Before instruction:
SUBWF
OPERAND, OPERAND = 04h, W = 05h
1
After instruction:
OPERAND = FFh
C=0
Z=0
FO
Fo P R
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SUBWF
Syntax
SUBWFC
Syntax
Operation
Flag Affected
Description
Cycle
Example 1:
SUBWFC
OPERAND, 1
Example 2:
SUBWFC
OPERAND, 1
Example 3:
SUBWFC
OPERAND, 1
Rev. 1.4
Subtract W and Carry from f
SUBWFC f, d
0  f  FFh
d  [0,1]
‧
[Destination]  [f] – [W] –C
C, DC, Z
Subtract the content of the W register from [f]. If d is 0, the result is stored in the W
register. If d is 1, the result is stored back in [f].
1
Before instruction:
OPERAND = 33h, W = 01h
C=1
After instruction:
OPERAND = 32h, C = 1, Z = 0
Before instruction:
OPERAND = 02h, W = 01h
C=0
After instruction:
OPERAND = 00h, C = 1, Z = 1
Before instruction:
OPERAND = 04h, W = 05h
C=0
After instruction:
OPERAND = Feh, C = 0, Z = 0
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FS98O22
XORLW
Syntax
Operation
Flag Affected
Description
5Fh
1
Before instruction:
W = Ach
After instruction:
W = F3h
FO
Fo P R
r R ro TU
ef pe NE
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'
en es
ce
O
nl
y
Cycle
Example:
XORLW
Exclusive OR literal with W
XORLW
k
0  k  FFh
[W]  [W] XOR k
Z
Exclusive OR the content of the W register and the eight-bit literal “k”. The result is
stored in the W register.
Exclusive OR W and f
XORWF
f, d
0  f  FFh
d  [0,1]
Operation
[Destination]  [W] XOR [f]
Flag Affected
Z
Description
Exclusive OR the content of the W register and [f]. If d is 0, the result is stored in the
W register. If d is 1, the result is stored back in [f].
Cycle
1
Example:
Before instruction:
XORWF
OPERAND,
OPERAND = 5Fh, W = Ach
1
After instruction:
OPERAND = F3h
XORWF
Syntax
Rev. 1.4
144/146
FS98O22
15. Package Information
FO
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15.1. Package Outline
Figure 15-1 FS98O22 package outline
Rev. 1.4
145/146
FS98O22
FO
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15.2. Package Outline(3.2mm QFP100)
Figure 15-2 FS98O22 3.2mm QFP100 package outline
16. Revision History
Ver.
1.0
1.1
Date
2006/2/16
2006/3/29
1.2
1.3
2008/12/25
2009/07/08
Page
All
17~19
23
134~135
33
20
1.4
2011/07/21
20
20
Rev. 1.4
Description
Initial release.
PC stack numbers modified 6 to 8, and PC bitwidth modified 11 to 12
PC stack numbers modified 6 to 8, and PC bitwidth modified 11 to 12
LEVEL setting of LCD bias
Low Battery Comparator Input Selector
Revise Ambient Operating Temperature from -10~85 C to -40~85 C
and add LTOL test condition description
Revise Sleep Current Unit：μ A
Revise Electrical Characteristics input offset TYP：1.5mV
146/146