ZILOG Z86L71

PRELIMINARY PRODUCT SPECIFICATION
1
Z86L70/71/75/C71
1
IR/LOW-VOLTAGE MICROCONTROLLER
FEATURES
ROM
(KB)
RAM*
(Bytes)
I/O
Voltage
Ranges
–
Part
Z86L70
Z86L71
Z86L75
Z86C71
2
8
4
8
125
237
237
237
14
16
14
16
2.0V to 3.9V
2.0V to 3.9V
2.0V to 3.9V
4.5V to 5.5V
–
Note: *General-Purpose
■
Two Standby Modes (Typical)
– STOP - 2 µA
– HALT - 0.8 mA
■
Special Architecture to Automate Both Generation and
Reception of Complex Pulses or Signals:
– One Programmable 8-Bit Counter/Timer with Two
Capture Registers
One Programmable 16-Bit Counter/Timer with
One Capture Register
Programmable Input Glitch Filter for Pulse
Reception
■
Five Priority Interrupts
■
Low Voltage Detection and Protection
■
Programmable Watch-Dog/Power-On Reset Circuits
■
Two Independent Comparators with Programmable
Interrupt Polarity
■
On-Chip Oscillator that Accepts a Crystal, Ceramic
Resonator, LC, RC (mask option), or External Clock
Drive
■
Mask Selectable 200 KOhm Pull-Ups on Ports 0, 2, 3
GENERAL DESCRIPTION
The Z86L7X family of IR (Infrared)/Low-Voltage Microcontrollers are ROM/ROMless-based members of the Z8®
MCU single-chip family with 237/125 bytes of internal
RAM. The differentiating factor between these devices is
the availability of RAM, ROM and package options. Offering the 3V versions (Z86LXX) with the Z86C71 gives optimum performance in both the low and high voltage ranges.
Zilog's CMOS Low-Voltage Microcontrollers offer fast execution, efficient use of memory, sophisticated interrupts, input/output bit manipulation capabilities, automated pulse
generation/reception, and internal key-scan pull-up resistors. The Z86L7X product line offers easy hardware/software system expansion with cost-effective and low power
consumption.
DS97LVO0500
The Z86L7X architecture is based on Zilog's 8-bit microcontroller core with an Expanded Register File to allow access to register mapped peripherals, I/O circuits, and powerful counter/timer circuitry. The Z8 MCU offers a flexible
I/O scheme, an efficient register and address space structure, and a number of ancillary features that are useful in
many consumer, automotive, computer peripheral, and
battery operated hand-held applications.
There are three basic address spaces available to support
a wide range of configurations: Program Memory, Register
File, and Expanded Register File. The register file is composed of 256/144 bytes of RAM. It includes four I/O port
registers, 15 control and status registers and the rest are
General-Purpose registers. The Expanded Register File
consists of two additional register groups (F and D). External Memory is not available on 18 and 20-pin versions.
PRELIMINARY
1-1
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
GENERAL DESCRIPTION (Continued)
To unburden the program from coping with such real-time
problems as generating complex waveforms or receiving
and demodulating complex waveform/pulses, the Z86L7X
family offers a new intelligent counter/timer architecture
with 8-bit and 16-bit counter/timers (Figure 1). Also included are a large number of user-selectable modes, and two
on-board comparators to process analog signals (Figure
2).
HI16
LO16
8
8
16-Bit
T16
1 2 4
Timer 16
16
8
8
8
SCLK
Clock
Divider
TC16H
TC16L
And/Or
Logic
HI8
LO8
8
8
Input
Glitch
Filter
Timer 8/16
Edge
Detect
Circuit
8-Bit
T8
Timer 8
8
8
TC8H
TC8L
Figure 1. Counter/Timer Block Diagram
1-2
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
Register File
144/256 x 8-bit
P00
P07
2
P31
P32
P33
Port 0
Port 3
Register Bus
Internal
Address Bus
ROM
2K/4K/8K x 8
I/O Bit
Programmable
P20
P21
P22
P23
P24
P25
P26
P27
1
P34
P35
P36
Z8 Core
Two Analog
Comparators
Internal Data Bus
Interrupt Control
Port 2
Expanded
Register Bus
Expanded
Register
File
Machine
Timing
&
Instruction
Control
Power
XTAL2
XTAL1
VDD
VSS
Counter/Timer 16
16-Bit
Counter/Timer 8
8-Bit
Figure 2. Functional Block Diagram
Note: All Signals with a preceding front slash, "/", are active Low, for example, B//W (WORD is active Low); /B/W
(BYTE is active Low, only).
DS97LVO0500
Power connections follow conventional descriptions below:
Connection
Circuit
Device
Power
VCC
VDD
Ground
GND
VSS
PRELIMINARY
1-3
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
PIN DESCRIPTION
P24
P25
P26
P27
VDD
XTAL2
XTAL1
P31
P32
1
18
Z86L70/75
DIP/SOIC
9
10
P23
P22
P21
P20
VSS
P36
P35
P34
P33
P24
P25
P26
P27
VDD
XTAL2
XTAL1
P31
P32
P00
Figure 3. 18-Pin DIP/SOIC Pin Assignments
1
20
Z86L71/C71
DIP/SOIC
10
11
P23
P22
P21
P20
VSS
P36
P35
P34
P33
P07
Figure 4. 20-Pin DIP/SOIC Pin Assignments
Table 1. Pin Identification
20-Pin
DIP & SOIC
10
11
17
18
19
20
1
2
3
4
8
9
12
13
14
15
7
6
5
16
1-4
18-Pin DIP
& SOIC
Symbol
Direction
15
16
17
18
1
2
3
4
8
9
10
11
12
13
7
6
5
14
P00
P07
P20
P21
P22
P23
P24
P25
P26
P27
P31
P32
P33
P34
P35
P36
XTAL1
XTAL2
VDD
VSS
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input/Output
Input
Input
Input
Output
Output
Output
Input
Output
PRELIMINARY
Description
Port 0 pins are individually configurable as
input or output.
Port 2 pins are individually configurable as
input or output.
IRQ2/Modulator Input
IRQ0
IRQ1
T8 output
T16 output
T8/T16 output
Crystal, Oscillator Clock
Crystal, Oscillator Clock
Power Supply
Ground
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
ABSOLUTE MAXIMUM RATINGS
Symbol
Description
Min
Max
Units
VCC
Supply Voltage (*)
-0.3
+7.0
V
TSTG
Storage Temp.
-65°
+150°
C
TA
Oper. Ambient
Temp.
†
C
Notes:
* Voltage on all pins with respect to GND.
† See Ordering Information
Stresses greater than those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; operation of the device at
any condition above those indicated in the operational sections of these specifications is not implied. Exposure to absolute maximum rating conditions for an extended period
may affect device reliability.
STANDARD TEST CONDITIONS
The characteristics listed below apply for standard test
conditions as noted. All voltages are referenced to GND.
Positive current flows into the referenced pin (Figure 5).
From Output
Under Test
I
150 pF
Figure 5. Test Load Diagram
CAPACITANCE
TA = 25°C, VCC = GND = 0V, f = 1.0 MHz, unmeasured pins returned to GND.
Parameter
Max
Input capacitance
Output capacitance
I/O capacitance
12 pF
12 pF
12 pF
DS97LVO0500
PRELIMINARY
1-5
1
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
DC CHARACTERISTICS (Z86L70/71/75 LOW VOLTAGE SPECIFICATIONS)
Preliminary
TA = 0°C to +70°C
Sym
VCH
VCL
Parameter
VCC
Max Input Voltage
2.0V
3.9V
Clock Input
High Voltage
2.0V
Clock Input
Low Voltage
Min
Typ @
25°C
Max
Units
Conditions
7
7
V
V
IIN <250 µA
IIN <250 µA
0.8 VCC
VCC + 0.3
V
3.9V
0.8 VCC
VCC + 0.3
V
2.0V
VSS – 0.3
0.2 VCC
V
3.9V
VSS– 0.3
0.2 VCC
V
Driven by External
Clock Generator
Driven by External
Clock Generator
Driven by External
Clock Generator
Driven by External
Clock Generator
VIH
Input High Voltage
2.0V
3.9V
0.7 VCC
0.7 VCC
VCC + 0.3
VCC + 0.3
0.5VCC
0.5VCC
V
V
VIL
Input Low Voltage
2.0V
3.9V
VSS – 0.3
VSS – 0.3
0.2 VCC
0.2 VCC
0.5VCC
0.5VCC
V
V
VOH1
Output High
Voltage
2.0V
3.9V
VCC – 0.4
VCC – 0.4
1.7
3.7
V
V
IOH = –0.5 mA
IOH = –0.5 mA
VOH2
Output High
Voltage (P36,
P37,P00, P01)
Output Low
Voltage
2.0V
3.9V
VCC - 0.8
VCC - 0.8
V
V
IOH = –7 mA
IOH = –7 mA
2.0V
3.9V
0.4
0.4
0.1
0.2
V
V
IOL = 1.0 mA
IOL = 4.0 mA
Output Low
Voltage
2.0V
0.8
0.5
V
IOL = 5.0 mA
3.9V
0.8
0.3
V
IOL = 7.0 mA
0.8
0.8
0.3
0.2
V
V
IOL = 10 mA
IOL = 10 mA
VOL1
VOL2*
VOL2
Output Low
Voltage(P36,
P37,P00,P01)
2.0V
3.9V
VRH
Reset Input
High Voltage
2.0V
3.9V
0.8 VCC
0.8 VCC
VCC
VCC
1.5
2.0
V
V
VRl
Reset Input
Low Voltage
2.0V
3.9V
VSS – 0.3
VSS – 0.3
0.2 VCC
0.2 VCC
0.5
0.9
V
V
VOFFSET
IIL
Comparator Input
Offset Voltage
Input Leakage
2.0V
3.9V
2.0V
3.9V
-1
-1
25
25
1
1
10
10
<1
<1
mV
mV
µA
µA
VIN = OV, VCC
VIN = OV, VCC
IOL
Output Leakage
2.0V
3.9V
–1
–1
1
1
<1
<1
µA
µA
VIN = OV, VCC
VIN = OV, VCC
IIR
Reset Input PullUp Current
2.0V
3.9V
–230
–400
-50
–90
µA
µA
VIN = OV
VIN = OV
ICC
Supply Current
2.0V
3.9V
2.0V
3.9V
10
15
250
850
4
10
100
500
mA
mA
µA
µA
@ 8.0 MHz
@ 8.0 MHz
@ 32 kHz
@ 32 kHz
1-6
PRELIMINARY
Notes
1,2
1,2
1,2,8
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
TA = 0°C to +70°C
Parameter
VCC
Standby Current
(WDT Off)
Sym
ICC1
ICC2
Standby Current
Min
Max
25°C
Units
2.0V
3
1
mA
3.9V
5
4
mA
2.0V
2
0.8
mA
3.9V
4
2.5
mA
2.0V
8
2
µA
3.9V
10
3
µA
2.0V
3.9V
500
800
310
600
µA
µA
VICR
Input Common Mode
Voltage Range
2.0V
3.9V
0
0
VCC - 1.0V
VCC - 1.0V
TPOR
Power-On Reset
Static RAM Data
Retention Voltage
VCC Low Voltage
Protection
ICC1
Crystal/Resonator
External Clock Drive
12
5
0.8
75
20
VRAM
2.0V
3.9V
Vram
VLV
Notes:
Typ @
Typ
3.0 mA
0.3 mA
Max
5
5
Conditions
HALT Mode
VIN = OV, VCC @
8.0 MHz
HALT Mode
VIN = OV, VCC
@ 8.0 MHz
Clock Divide-by16 @ 8.0 MHz
Clock Divide-by16 @ 8.0 MHz
STOP Mode
VIN = OV, VCC
WDT is not
Running
STOP Mode
VIN = OV, VCC
WDT is not
Running
STOP Mode
VIN = OV, VCC
WDT is Running
V
V
18
7
0.5
ms
ms
V
2.15
1.7
V
Unit
mA
mA
Frequency
8.0 MHz
8.0 MHz
Notes
1,2
1,2
1,2
1,2
3,5
3,5
3,5
8
6
8 MHz max
Ext. CLK Freq.
4
1. All outputs unloaded, inputs at rail.
2. CL1 = CL2 = 100 pF
3. Same as note [4] except inputs at V CC.
4. The VLV increases as the temperature decreases.
5. Oscillator stopped
6. Oscillator stops when VCC falls below VLV limit.
7. 32 kHz clock driver input.
8. For analog comparator, inputs when analog comparators are enabled.
* All Outputs excluding P00, P01, P36, and P37.
DS97LVO0500
PRELIMINARY
1-7
1
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
DC CHARACTERISTICS (Z86C71 SPECIFICATIONS)
Preliminary
TA = 0°C to +70°C
Sym
Parameter
VCC
Min
Max
Typ @
25°C
Units
Conditions
7
7
V
V
IIN 250 µA
IIN 250 µA
0.9 VCC
0.9 VCC
VCC + 0.3
VCC + 0.3
V
4.5V
5.5V
VSS – 0.3
VSS –0.3
0.2 VCC
0.2 VCC
V
Input High
Voltage
4.5V
5.5V
0.7 VCC
0.7 VCC
VCC + 0.3
VCC + 0.3
Driven by
External Clock
Generator
Driven by
External Clock
Generator
Driven by
External Clock
Generator
Input Low
Voltage
4.5V
5.5V
VOH1
Output High
Voltage
VOH2
Max Input
Voltage
4.5V
5.5V
VCH
Clock Input
High Voltage
4.5V
5.5V
VCL
Clock Input
Low Voltage
VIH
VIL
0.5VCC
0.5VCC
V
VSS – 0.3
VSS – 0.3
0.5VCC
0.5VCC
V
4.5V
5.5V
VCC – 0.4
VCC – 0.4
4.4
5.4
V
IOH = –0.5 mA
IOH = –0.5 mA
Output High
Voltage
(P36, P37)
Output Low
Voltage
4.5V
5.5V
VCC – 0.8
VCC – 0.8
V
V
IOH = –7 mA
IOH = –7 mA
4.5V
5.5V
0.4
0.4
0.1
0.2
V
V
IOL = 1.0 mA
IOL = 4.0 mA
VOL2*
Output Low
Voltage
4.5V
3.9 V
0.8
0.8
0.3
0.4
V
V
IOL = 5.0 mA
IOL = 7.0 mA
VOL2
Output Low
Voltage
(P00, P01,
P36,P37)
Reset Input
High Voltage
4.5V
5.5V
0.8
0.8
0.3
0.2
V
IOL = 10 mA
4.5V
5.5V
0.8 VCC
0.8 VCC
VCC
VCC
2.5
3.0
V
V
Reset Input
Low Voltage
4.5V
5.5V
VSS – 0.3
VSS – 0.3
0.2 VCC
0.2 VCC
0.5
0.9
25
25
10
10
mV
mV
VOL1
VRH
VRl
VOFFSET Comparator
Input
Offset Voltage
IIL
Input Leakage
4.5V
5.5V
-1
-1
1
1
<1
<1
µA
µA
VIN = OV, VCC
VIN = OV, VCC
-1
-1
1
1
<1
<1
µA
µA
VIN = OV, VCC
VIN = OV, VCC
10
10
µA
µA
mA
mA
µA
µA
@8.0 MHz
@8.0 MHz
@ 32 kHz
@ 32 kHz
IOL
Output Leakage
4.5V
5.5V
IIR
Reset Input
Current
Supply Current
4.5V
5.5V
4.5V
5.5V
4.5V
5.5V
ICC
WDT Off
1-8
4.5V
5.5V
-500
-800
20
30
1000
1250
PRELIMINARY
Notes
1,2
1.2
1,2,8
1,2,8
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
TA = 0°C to +70°C
Parameter
VCC
Standby Current
(WDT Off)
Sym
ICC1
ICC2
Standby Current
Min
Max
25°C
Units
4.5V
6
2
mA
5.5V
8
5
mA
4.5V
5
1.0
mA
5.5V
7
3.0
mA
4.5V
8
2
µA
5.5V
10
3
µA
4.5V
5.5V
500
800
310
600
µA
µA
VICR
Input Common Mode
Voltage Range
2.0V
3.9V
0
0
VCC - 1.0V
VCC - 1.0V
TPOR
Power-On Reset
Static RAM Data
Retention Voltage
VCC Low Voltage
Protection
ICC1
Crystal/Resonator
External Clock Drive
5.0
4.0
0.8
75
20
VRAM
4.5V
5.5V
VRAM
VLV
Notes:
Typ @
Typ
3.5 mA
0.8 mA
Max
5
5
Conditions
HALT Mode
VIN = OV, VCC @
8.0 MHz
HALT Mode
VIN = OV, VCC
@ 8.0 MHz
Clock Divide-by16 @ 8.0 MHz
Clock Divide-by16 @ 8.0 MHz
STOP Mode
VIN = OV, VCC
WDT is not
Running
STOP Mode
VIN = OV, VCC
WDT is not
Running
STOP Mode
VIN = OV, VCC
WDT is Running
V
V
8.0
6.0
0.5
ms
ms
V
2.15
1.7
V
Unit
mA
mA
Frequency
8.0 MHz
8.0 MHz
Notes
1,2
1,2
1,2
1,2
3,5
3,5
3,5
8
6
8 MHz max
Ext. CLK Freq.
4
1. All outputs unloaded, inputs at rail.
2. CL1 = CL2 = 100 pF
3. Same as note [4] except inputs at V CC.
4. The VLV increases as the temperature decreases.
5. Oscillator stopped
6. Oscillator stops when VCC falls below VLV limit.
7. 32 kHz clock driver input
8. For analog comparator, inputs when analog comparators are enabled.
* All Outputs excluding P00, P01, P36, and P37.
DS97LVO0500
PRELIMINARY
1-9
1
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
AC CHARACTERISTICS
External I/O or Memory Read and Write Timing Diagram
R//W
13
12
19
Port 0, /DM
16
18
Port 1
20
3
A7 - A0
1
D7 - D0 IN
2
9
/AS
8
11
4
5
/DS
(Read)
6
17
10
Port 1
A7 - A0
D7 - D0
OUT
14
15
7
/DS
(Write)
Figure 6. External I/O or Memory Read/Write Timing
1-10
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
AC CHARACTERISTICS
External I/O or Memory Read and Write Timing Table
1
TA = 0°C to +70°C
8.0 MHz
No
Symbol
Parameter
VCC
Min
Address Valid to /AS
Rising Delay
/AS Rising to Address
Float Delay
/AS Rising to Read
Data Required Valid
/AS Low Width
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
55
55
70
70
1
TdA(AS)
2
TdAS(A)
3
TdAS(DR)
4
TwAS
5
Td
6
TwDSR
Address Float to /DS
Falling
/DS (Read) Low Width
7
TwDSW
/DS (Write) Low Width
8
TdDSR(DR)
9
ThDR(DS)
10
TdDS(A)
11
TdDS(AS)
/DS Falling to Read
Data Required Valid
Read Data to
/DS Rising Hold Time
/DS Rising to Address
Active Delay
/DS Rising to /AS
12
TdR/W(AS)
13
TdDS(R/W)
14
TdDW(DSW)
15
TdDS(DW)
16
TdA(DR)
17
TdAS(DS)
18
TdM(AS)
19
TdDS(DM)
20
ThDS(A)
R//W Valid to /AS
Rising Delay
/DS Rising to
R//W Not Valid
Write Data Valid to
/DS Falling (Write)
Delay
/DS Rising to Write
Data Not Valid Delay
Address Valid to Read
Data Required Valid
/AS Rising to /DS
Falling Delay
/DM Valid to /AS
Falling Delay
/DS Rise to /DM Valid
Delay
/DS Rise to Address
Valid Hold Time
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
Max
400
400
80
80
0
0
300
300
165
165
260
260
0
0
85
85
60
70
70
70
70
70
80
80
70
80
475
475
100
100
55
55
70
70
70
70
Units
Notes
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
2
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
2
1,2
2
1,2
1,2
1,2
2
2
2
2
2
2
2
1,2
2
2
Notes:
1. When using extended memory timing add 2 TpC.
2. Timing numbers given are for minimum TpC.
Standard Test Load
All timing references use 0.9 VCC for a logic 1 and 0.1 VCC for a logic 0.
DS97LVO0500
PRELIMINARY
1-11
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
AC CHARACTERISTICS
Additional Timing Diagram
3
1
Clock
2
7
T
2
3
7
IN
4
5
6
IRQ
N
8
9
Clock
Setup
11
Stop
Mode
Recovery
Source
10
Figure 7. Additional Timing
1-12
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
AC CHARACTERISTICS
Additional Timing Table
1
TA = 0°C to +70°C
8.0 MHz
No
Symbol
Parameter
1
TpC
Input Clock Period
2
TrC, TfC
3
TwC
Clock Input Rise and
Fall Times
Input Clock Width
4
TwTinL
5
TwTinH
6
TpTin
Timer Input Low
Width
Timer Input High
Width
Timer Input Period
7
TrTin, TfTin
Timer Input Rise
8A
TwIL
8B
TwIL
9
TwIH
10
Twsm
Interrupt Request
Low Time
Int. Request Low
Time
Interrupt Request
Input High Time
Stop-Mode
Recovery Width
Spec
11
Tost
12
Twdt
Oscillator Start-up
Time
Watch-Dog Timer
Delay Time
(5 ms)
10 ms
20 ms
80 ms
VCC
Min
Max
Units
Notes
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
4.5V
5.5V
4.5V
5.5V
2.0V
3.9V
2.0V
121
121
DC
DC
25
25
ns
ns
ns
ns
ns
ns
ns
ns
100
100
ns
ns
ns
ns
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
2.0V
3.9V
12
5
5TpC
5TpC
75
20
ms
ms
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1,2
1,2
1,3
1,3
1,2
1,2
8
8
7
7
4
4
D0=0, 5
D1=0, 5
20
10
50
20
225
80
150
40
300
80
1200
320
ms
ms
ms
ms
ms
ms
D0=1, 5
D1=0, 5
D0=1, 5
D1=0, 5
D0=1, 5
D1=0, 5
37
37
100
70
3TpC
3TpC
8TpC
8TpC
100
70
5TpC
5TpC
5TpC
5TpC
12
12
5TpC
5TpC
ns
ns
Notes:
1. Timing Reference uses 0.9 VCC for a logic 1 and 0.1 VCC for a logic 0.
2. Interrupt request through Port 3 (P33-P31).
3. Interrupt request through Port 3 (P30).
4. SMR - D5 = 0
5. Reg. WDTMR
6. Reg. SMR - D5 = 0
7. Reg. SMR - D5 = 1
DS97LVO0500
PRELIMINARY
1-13
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
PIN FUNCTIONS
XTAL1 Crystal 1 (time-based input). This pin connects a
parallel-resonant crystal, ceramic resonator, LC, or RC
network or an external single-phase clock to the on-chip
oscillator input.
Port 0 (P07-P00). Port 0 is an two-bit, bidirectional,
CMOS-compatible port. These I/O lines are configured under software control as an I/O port. The output drivers are
push-pull.
XTAL2 Crystal 2 (time-based output). This pin connects a
parallel-resonant, crystal, ceramic resonant, LC, or RC
network to the on-chip oscillator output.
An optional 200 KOhm pull-up is available as a mask option on both Port 0 bits.
These pull-ups are disabled when configured (bit by
bit) as an output.
Mask
Option
OEN
200 KΩ
PAD
Out
In
Figure 8. Port 0 Configuration
1-14
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
Port 2 (P27-P20). Port 2 is an 8-bit, bidirectional, CMOScompatible I/O port. These eight I/O lines can be independently configured under software control as inputs or outputs. Port 2 is always available for I/O operation. A mask
option is available to connect eight 200 KOhms (±50%)
pull-up resistors on this port. Bits programmed as outputs
are globally programmed as either push-pull or open-
Z86LXX
MCU
drain. The Z8 wakes up with the eight bits of Port 2 configured as inputs with open-drain outputs.
Port 2 also has an 8-bit input OR and an AND gate which
can be used to wake up the part from STOP Mode (Figure
33). P20 can be programmed to access the edge selection
circuitry (Figure 9).
Port 2 (I/O)
VCC
Open-Drain
200 KΩ
OEN
Mask
Option
PAD
Out
In
Figure 9. Port 2 Configuration
DS97LVO0500
PRELIMINARY
1-15
1
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
PIN FUNCTIONS (Continued)
Port 3 (P36-P31). Port 3 is a 6-bit, CMOS-compatible
three fixed input and three fixed output port. Port 3 consists
of three fixed input (P33-P31) and three fixed output (P36P34), and can be configured under software control for Input/Output, Interrupt, and output from the counter/timers.
P31, P32, and P33 are standard CMOS inputs; outputs are
push-pull, except for P34, P35 which have floating drain
capability (controlled by P3M, D0).
Port 3 provides the following control functions: three external interrupt request signals (IRQ2-IRQ0).
Port 3 also provides output for each of the counter/timers
and the AND/OR Logic. Control is performed by programming bits D5-D4 of CTRI, bit 0 of CTR0 and bit 0 of CTR2.
Table 2. Pin Assignments
Two on-board comparators process analog signals on P31
and P32 with reference to the voltage on P33. The analog
function is enabled by programming the Port 3 Mode Register (bit 1). P31 and P32 are programmable as rising, falling, or both edge triggered interrupts (IRQ register bits 6
and 7). Pref1 and P33 are the comparator reference voltage inputs. Access to the Counter Timer edge detection
circuit is through P31 or P20 (see CTR1 description).
Pin
I/O
C/T
Comp.
Int.
P31
P32
P33
IN
IN
IN
IN
AN1
AN2
VREF
IRQ2
IRQ0
IRQ1
P34
P35
P36
P20
OUT
OUT
OUT
I/O
T8
T16
T8/16
IN
A01
Ext
DM
P34
Counter/Timer
PAD
T8
P34 OUT
P34 OUT
P31
+
-
Comp1
CTR0
P33
D0
P32
+
-
0 Normal Control
1 8-bit Timer output active
Comp2
P33
PCON
D0
0 = P34 Standard Output*
1 = P34 Comparator Output
*
Reset condition.
Figure 10. Port 3 Configuration
1-16
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
Comparator Inputs. In Analog Mode, Port 3 (P31 and
P32) have a comparator front end. P33 serves as the reference for both comparators. In this mode, the P33 internal
data latch and its corresponding IRQ1 is diverted to the
SMR Sources (excluding P31, P32, and P33) as shown in
Figure 38. In digital mode, P33 is used as D3 of the Port 3
input register which then generates IRQ1 as shown in Figure 16.
Notes: Comparators are powered down by entering STOP
Mode. For P31-P33 to be used as a Stop-Mode Recovery
source, these inputs must be placed into digital mode.
Comparator Outputs. COMP1 may be programmed to be
outputted on P34 through the PCON register (Figure 15).
Power-On Reset. the typical reset output time is 5 ms.
The Z86L7X does not reset WDTMR, SMR, P2M, or P3M
registers on a Stop-Mode Recovery operation.
Pref1
200 KΩ
P31
P32
Z86L7X
MCU
P33
Mask
Option
Port 3
(I/O or Handshake)
P34
P35
Note:
P31, 32, 33 have a 200 KΩ
mask option
P36
P37
R247 = P3M
D1
1 = Analog
0 = Digital
DIG.
P31 (AN1)
+
Pref
IRQ2, P31 Data Latch
Comp1
AN.
-
P32 (AN2)
IRQ0, P32 Data Latch
Comp2
+
P33 (REF2)
-
IRQ1, P33 Data Latch
From Stop-Mode
Recovery Source of SMR
Figure 11. Port 3 Configuration
DS97LVO0500
PRELIMINARY
1-17
1
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
PIN FUNCTIONS (Continued)
CTR0, D0
Out 34
T8_Out
VDD
MUX
Pad
P34
CTR2, D0
VDD
Out 35
MUX
Pad
T16_Out
P35
CTR1, D6
VDD
Out 36
T8/16_Out
MUX
Pad
P36
Figure 12. Port 3 Configuration
1-18
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
FUNCTIONAL DESCRIPTION
The Z8 incorporates special functions to enhance the Z8's
functionality in consumer and battery operated applications.
Reset. The device is reset in one of the following conditions:
1
Location of
First Byte of
Instruction
Executed
After RESET
1. Power-On Reset
On-Chip
ROM
12
Reset Start Address
11
Reserved
10
Reserved
9
IRQ4
8
IRQ4
7
IRQ3
6
IRQ3
5
IRQ2
4
IRQ2
3
IRQ1
2
IRQ1
1
IRQ0
0
IRQ0
2. Watch-Dog Timer
3. Stop-Mode Recovery Source
4. Low Voltage Detection
Program Memory. The Z86L7X addresses up to 2K, 4K,
8 KB of internal program memory, with the remainder being external memory (Figure 13). The first 12 bytes of program memory are reserved for the interrupt vectors. These
locations contain five 16-bit vectors that correspond to the
five available interrupts. Addresses 12 to 2K, 4K, 8K (dependent on version) consist of on-chip mask-programmed
ROM.
Interrupt
Vector
(Lower Byte)
Interrupt
Vector
(Upper Byte)
Figure 13. Program Memory Map
DS97LVO0500
PRELIMINARY
1-19
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
Expanded Register File. The register file has been expanded to allow for additional system control registers,
and for mapping of additional peripheral devices into the
register address area. The Z8 register address space R0
through R15 has been implemented as 16 banks of 16 registers per bank. These register groups are known as the
ERF (Expanded Register File). Bits 7-4 of register RP select the working register group. Bits 3-0 of register RP select the expanded register file bank. Note that expanded
register bank is also referred to as expanded register
group (Figure14).
The upper nibble of the register pointer (Figure 23) selects
which working register group of 16 bytes in the register file,
out of the possible 256, will be accessed. The lower nibble
selects the expanded register file bank and, in the case of
the Z86LXX family, banks 0, F, and D are implemented. A
0h in the lower nibble will allow the normal register file
(bank 0) to be addressed, but any other value from 1H to
FH will exchange the lower 16 registers to an expanded
register bank.
1-20
For example:
Z86L70: (See Figure 16)
R253 RP = 00H
R0 = Port 0
R1 = Port 1
R2 = Port 2
R3 = Port 3
But if:
R253 RP = 0DH
R0 = CTRL0
R1 = CTRL1
R2 = CTRL2
R3 = Reserved
The counter/timers are mapped into ERF group D. Access
is easily done using the following example:
LD
RP, #0DH Select ERF D for access to bank D ( working register group 0)
LD
R0,#xx
load CTRL0
LD
1, #xx
load CTRL1
LD
R1, 2
CTRL2 → CTRL1
LD
RP, #7DH Select expanded register bank D and
working register group 7 of bank 0 for access .
LD
71H, 2
CTRL2 → register 71H
LD
R1, 2
CTRL2 → register 71H
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
Z8® STANDARD CONTROL REGISTERS
1
RESET CONDITION
D7 D6 D5 D4 D3 D2 D1 D0
REGISTER**
REGISTER POINTER
7
6
5
4
3
2
1
0
Expanded Register
File (Bank) Pointer
Working Register
Group Pointer
*
*
FF
SPL
U
U
U
U
U
U
U
U
FE
SPH
U
U
U
U
U
U
U
U
FD
RP
0
0
0
0
0
0
0
0
FC
FLAGS
U
U
U
U
U
U
U
U
FB
IMR
0
U
U
U
U
U
U
U
FA
IRQ
0
0
0
0
0
0
0
0
F9
IPR
U
U
U
U
U
U
U
U
F8
P01M
0
1
0
0
1
1
0
1
F7
P3M
0
0
0
0
0
0
0
0
F6
P2M
1
1
1
1
1
1
1
1
U
F5
Reserved
U
U
U
U
U
U
U
FF
F4
Reserved
U
U
U
U
U
U
U
U
FO
F3
Reserved
U
U
U
U
U
U
U
U
F2
Z8 Register File**
Reserved
U
U
U
U
U
U
U
U
F1
Reserved
0
0
0
0
0
0
0
0
F0
Reserved
0
U
U
0
0
0
0
0
U
U
U
0
1
1
0
1
U
0
U
0
0
0
U
U
0
0
1
0
0
0
U
0
U
U
U
U
U
U
U
0
EXPANDED REG. GROUP (F)
REGISTER**
*
7F
Reserved
†
(F) 0F
WDTMR
(F) 0E
Reserved
(F) 0D
SMR2
(F) 0C
Reserved
(F) 0B
RESET CONDITION
SMR
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
0F
00
Reserved
Reserved
Reserved
Reserved
*
(F) 01
Reserved
(F) 00
PCON
EXPANDED REG. GROUP (D)
REGISTER**
EXPANDED REG. GROUP (0)
REGISTER**
@
*
RESET CONDITION
RESET CONDITION
(D) 0C
Reserved
(D) 0B
HI8
U
U
U
U
U
U
U
U
U
(D) 0A
L08
U
U
U
U
U
U
U
U
U
U
(D) 09
HI16
U
U
U
U
U
U
U
U
U
U
(D) 08
L016
U
U
U
U
U
U
U
U
U
(D) 07
TC16H
U
U
U
U
U
U
U
U
(D) 06
TC16L
U
U
U
U
U
U
U
U
(D) 05
TC8H
U
U
U
U
U
U
U
U
** All addresses are in Hexadecimal
(D) 04
TC8L
U
U
U
U
U
U
U
U
† Will not be reset with a Stop-Mode Recovery, except Bit 0.
(D) 03
Reserved
@ P36 is set to an unknown state upon SMR Reset. Rest of
ports will not be affected.
(D) 02
CTR2
0
U
U
U
U
U
U
U
(D) 01
CTR1
U
U
U
U
U
U
U
U
(D) 00
CTR0
0
U
U
U
U
U
U
U
(0) 03
U
U
U
P3
0
U
1
1
(0) 02
P2
U
U
U
U
U
U
(0) 01
P1
U
U
U
U
U
U
(0) 00
P0
U
U
U
U
U
U
U
U = Unknown
* Will not be reset with a Stop-Mode Recovery
Figure 14. Expanded Register File Architecture
DS97LVO0500
PRELIMINARY
1-21
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
R253 RP
D7 D6 D5 D4 D3 D2 D1 D0
r7 r 6 r5 r 4
Expanded Register Bank
File Pointer
Default Setting After
Reset = 0000 0000
Working Register
Pointer
r3 r 2 r1 r 0
R253
The upper nibble of the register file address
provided by the register pointer specifies
the active working-register group
7F
70
6F
Figure 15. Register Pointer
60
5F
RAM/Register File. The register file (group 0) consists of
four I/O port registers, 236 general purpose registers, and
16 control and status registers (R0-R3, R4-R239, and
R240-R255, respectively), plus two expanded registers
group (Banks D and F). In the 4-bit mode, the register file
is divided into 16 working register groups, each occupying
16 continuous locations. The Register Pointer addresses
the starting location of the active working register group.
50
4F
40
3F
The lower nibble
of the register
file address
provided by the
instruction points
to the specified
register
Specified Working
Register Group
30
2F
20
1F
Register Group 1
R15 to R0
Register Group 0
R15 to R4 *
10
Note: Registers E0-EF of Bank 0 are only accessed
through working registers and indirect addressing modes.
0F
00
Stack. The Z86L7X internal register file is used for the
stack. An 8-bit Stack Pointer (R255) is used for the internal
stack that resides in the general-purpose registers (R4R239).
1-22
PRELIMINARY
I/O Ports
R3 to R0 *
* RP = 00: Selects Register Group 0, Working Register 0.
Figure 16. Register Pointer
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
Counter/Timer Register Description
HI16(D)%09: Holds the captured data from the output of
the 16-bit Counter/Timer16. This register holds the MSByte of the data.
Expanded Register Group D
(D)%0C
(D)%0B
(D)%0A
(D)%09
(D)%08
(D)%07
(D)%06
(D)%05
(D)%04
(D)%03
(D)%02
(D)%01
(D)%00
Reserved
HI8
LO8
HI16
LO16
TC16H
TC16L
TC8H
TC8L
Reserved
CTR2
CTR1
CTR0
T8_Capture_HI
Bit Position
76543210
Description
Bit Position
T16_Capture_LO
76543210
76543210
Field
Bit
Position
T16_Capture_LO
76543210
R
W
Captured Data
No Effect
Description
R Captured Data
W No Effect
Description
R
W
Captured Data
No Effect
TC16H(D)%07: Counter/Timer2 MS-Byte Hold Register.
Field
Bit
Position
T16_Data_HI
76543210
R Captured Data
W No Effect
L08(D)%0A: Holds the captured data from the output of
the 8-bit Counter/Timer0. This register is typically used to
hold the number of counts when the input signal is 0.
Field
T16_Capture_HI
Description
L016(D)%08: Holds the captured data from the output of
the 16-bit Counter/Timer16. This register holds the LSByte of the data.
HI8(D)%0B: Holds the captured data from the output of the
8-bit Counter/Timer0. This register is typically used to hold
the number of counts when the input signal is 1.
Field
Field
Bit
Position
Description
R
W
Data
TC16L(D)%06: Counter/Timer2 LS-Byte Hold Register.
Field
Bit
Position
T16_Data_LO
76543210
Description
R/W
Data
TC8H(D)%05: Counter/Timer8 High Hold Register.
Field
Bit Position
T8_Level_HI
76543210
Description
R/W
Data
TC8L(D)%04: Counter/Timer8 Low Hold Register.
DS97LVO0500
Field
Bit Position
T8_Level_LO
76543210
PRELIMINARY
Description
R/W
Data
1-23
1
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
CTR0 (D)00: Counter/Timer8 Control Register.
Field
T8_Enable
Bit Position
7-------
Value
R
W
Single/Modulo-N
-6------
R/W
Time_Out
--5-----
R
T8_Clock
---43---
R/W
Capture_INT_Mask
-----2--
R/W
Counter_INT_Mask
------1-
R/W
P34_Out
-------0
R/W
0*
1
0
1
0
1
0
00
01
10
11
0
1
0
1
0
1
Description
Counter Disabled
Counter Enabled
Stop Counter
Enable Counter
Modulo-N
Single Pass
No Counter Time-Out
Counter Time-Out Occurred
No Effect
Reset Flag to 0
SCLK
SCLK/2
SCLK/4
SCLK/8
Disabled Data Capture Int.
Enable Data Capture Int.
Disable Data Capture Int.
Enable Time-Out Int.
P34 as Port Output
T8 Output on P34
CTR0: Counter/Timer8 Control Register Description
T8 Clock. Defines the frequency of the input signal to T8.
T8 Enable. This field enables T8 when set (written) to 1.
Capture_INT_Mask. Set this bit to allow interrupt when
data is captured into either LO8 or HI8 upon a positive or
negative edge detection in demodulation mode.
Single/Modulo-N. When set to 0 (modulo-n), the counter
reloads the initial value when the terminal count is
reached. When set to 1 (single pass), the counter stops
when the terminal count is reached.
Time-Out. This bit is set when T8 times out (terminal count
reached). To reset this bit, a 1 should be written to this location. This is the only way to reset this status condition,
therefore, care should be taken to reset this bit prior to using/enabling the counter/timers.
Counter_INT_Mask. Set this bit to allow interrupt when T8
has a time out.
P34_Out. This bit defines whether P34 is used as a normal
output pin or the T8 output.
Note: Care must be taken when utilizing the OR or AND
commands to manipulate CTR0, bit 5 and CTR1, bits 0
and 1 (Demodulation Mode). These instructions use a
Read-Modify-Write sequence in which the current status
from the CTR0 and CTR1 registers will be ORed or ANDed
with the designated value and then written back into the
registers. Example: When the status of bit 5 is 1, a reset
condition will occur.
1-24
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
CTR1 (D)01: Controls the functions in common with the T8 and T16
Field
Bit Position
Value
Mode
7-------
R/W
P36_Out/
Demodulator_Input
-6------
R/W
0
1
0
1
0
1
T8/T16_Logic/
Edge _Detect
--54----
R/W
00
01
10
11
00
01
10
11
Transmit_Submode/Glitch_
Filter
----32--
R/W
00
01
10
11
00
01
10
11
Initial_T8_Out/
Rising_Edge
------1R/W
0
1
R
0
1
0
1
W
Initial_T16_Out/
Falling _Edge
-------0
R/W
0
1
R
0
1
0
1
W
DS97LVO0500
PRELIMINARY
Description
1
Transmit Mode
Demodulation Mode
Transmit Mode
Port Output
T8/T16 Output
Demodulation Mode
P31
P20
Transmit Mode
AND
OR
NOR
NAND
Demodulation Mode
Falling Edge
Rising Edge
Both Edges
Reserved
Transmit Mode
Normal Operation
Ping-Pong Mode
T16_Out=0
T16_Out=1
Demodulation Mode
No Filter
4 SCLK Cycle
8 SCLK Cycle
16 SCLK Cycle
Transmit Mode
T8_OUT is 1 Initially
T8_OUT is 1 Initially
Demodulation Mode
No Rising Edge
Rising Edge Detected
No Effect
Reset Flag to 0
Transmit Mode
T16_OUT is 0 Initially
T16_OUT is 1 Initially
Demodulation Mode
No Falling Edge
Falling Edge Detected
No Effect
Reset Flag to 0
1-25
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
CTR1 Register Description
Mode. If it is 0, the Counter/Timers are in the transmit
mode, otherwise they are in the demodulation mode.
P36_Out/Demodulator_Input. In Transmit Mode, this bit
defines whether P36 is used as a normal output pin or the
combined output of T8 and T16.
In Demodulation Mode, this bit defines whether the input
signal to the Counter/Timers is from P20 or P31.
T8/T16_Logic/Edge _Detect. In Transmit Mode, this field
defines how the outputs of T8 and T16 are combined
(AND, OR, NOR, NAND).
In Demodulation Mode, this field defines which edge
should be detected by the edge detector.
Transmit_Submode/Glitch Filter. In Transmit Mode, this
field defines whether T8 and T16 are in the "Ping-Pong"
mode or in independent normal operation mode. Setting
this field to "Normal Operation Mode" terminates the "PingPong Mode" operation. When set to 10, T16 is immediately
forced to a 0. When set to 11, T16 is immediately forced to
a 1.
In Demodulation Mode, this field defines the width of the
glitch that should be filtered out.
Initial_T8_Out/Rising_Edge. In Transmit Mode, if 0, the
output of T8 is set to 0 when it starts to count. If 1, the output of T8 is set to 1 when it starts to count. When this bit is
set to 1 or 0, T8_OUT will be set to the opposite state of
this bit. This insures that when the clock is enabled a transition occurs to the initial state set by CTR1, D1.
In Demodulation Mode, this bit is set to 1 when a rising
edge is detected in the input signal. In order to reset it, a 1
should be written to this location.
Initial_T16 Out/Falling _Edge. In Transmit Mode, if it is 0,
the output of T16 is set to 0 when it starts to count. If it is
1, the output of T16 is set to 1 when it starts to count. This
bit is effective only in Normal or Ping-Pong Mode (CTR1,
D3, D2). When this bit is set, T16_OUT will be set to the
opposite state of this bit. This insures that when the clock
is enabled a transition occurs to the initial state set by
CTR1, D0.
In Demodulation Mode, this bit is set to 1 when a falling
edge is detected in the input signal. In order to reset it, a 1
should be written to this location.
Note: Modifying CTR1, (D1 or D0) while the counters are
enabled will cause un-predictable output from T8/16_OUT.
1-26
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
CTR2 (D)%02: Counter/Timer16 Control Register.
Field
T16_Enable
Bit Position
Value
R
7-------
W
Single/Modulo-N
0*
1
0
1
R/W
-6------
0
1
Time_Out
--5-----
R
T16 _Clock
---43---
R/W
Capture_INT_Mask
-----2--
R/W
Counter_INT_Mask
------1-
R/W
P35_Out
-------0
R/W
0
1
0
1
0
1
00
01
10
11
0
1
0
1
0
1
Description
1
Counter Disabled
Counter Enabled
Stop Counter
Enable Counter
Transmit Mode
Modulo-N
Single Pass
Demodulation Mode
T16 Recognizes Edge
T16 Does Not Recognize Edge
No Counter Time-Out
Counter Time-Out Occurred
No Effect
Reset Flag to 0
SCLK
SCLK/2
SCLK/4
SCLK/8
Disable Data Capture Int.
Enable Data Capture Int.
Disable Time-Out Int.
Enable Time-Out Int.
P35 as Port Output
T16 Output on P35
Note: * Indicates the value upon Power-On Reset
CTR2 Description
T16_Enable. This field enables T16 when set to 1.
Single/Modulo-N. In Transmit Mode, when set to 0, the
counter reloads the initial value when terminal count is
reached. When set to 1, the counter stops when the terminal count is reached.
In Demodulation Mode, when set to 0 , T16 captures and
reloads on detection of all the edges; when set to 1, T16
captures and detects on the first edge, but ignores the subsequent edges. For details, see the description of T16 Demodulation Mode.
DS97LVO0500
Time_Out. This bit is set when T16 times out (terminal
count reached). In order to reset it, a 1 should be written to
this location.
T16_Clock. Defines the frequency of the input signal to
Counter/Timer16.
Capture_INT_Mask. Set this bit to allow interrupt when
data is captured into LO16 and HI16.
Counter_INT_Mask. Set this bit to allow interrupt when
T16 times out.
P35_Out. This bit defines whether P35 is used as a normal
output pin or T16 output.
PRELIMINARY
1-27
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
SMR2(F)%0D: Stop-Mode Recovery Register 2.
Field
Bit Position
Value
Reserved
Recovery Level
7-------6------
W
Reserved
Source
--5-------432--
W
0
0*
1
0
000*
001
010
011
100
101
110
111
00
Reserved
------10
Note: * Indicates the value upon Power-On Reset.
1-28
PRELIMINARY
Description
Reserved (Must be 0)
Low
High
Reserved (Must be 0)
A. POR Only
B. NAND of P23-P20
C. NAND or P27-P20
D. NOR of P33-P31
E. NAND of P33-P31
F. NOR of P33-P31, P00,P07
G. NAND of P33-P31,P00,P07
H. NAND of P33-P31,P22-P20
Reserved (Must be 0)
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
Counter/Timer Functional Blocks
1
CTR1 D5,D4
P31
Glitch
Filter
MUX
P20
Pos Edge
Edge
Detector
Neg Edge
CTR1 D6
CTR1 D3,D2
Figure 17. Glitch Filter Circuitry
Z8 Data Bus
CTR0 D2
Pos Edge
IRQ4
Neg Edge
HI8
LO8
CTR0 D4, D3
SCLK
CTR0 D1
Clock
Select
Clock
TC8H
8-Bit
Counter T8
T8_OUT
TC8L
Z8 Data Bus
Figure 18. 8-Bit Counter/Timer Circuits
DS97LVO0500
PRELIMINARY
1-29
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
FUNCTIONAL DESCRIPTION (Continued)
Input Circuit
The edge detector monitors the input signal on P31 or P20.
Based on CTR1 D5-D4, a pulse is generated at the Pos
Edge or Neg Edge line when an edge is detected. Glitches
in the input signal which have a width less than specified
(CTR1 D3, D2) are filtered out.
T8 Transmit Mode
When T8 is enabled, the output of T8 depends on CTR1,
D1. If it is 0, T8_OUT is 1. If it is 1, T8_OUT is 0.
When T8 is enabled, the output T8_OUT switches to the
initial value (CTR1 D1). If the initial value (CTR1 D1) is 0,
TC8L is loaded, otherwise TC8H is loaded into the
counter. In Single-Pass Mode (CTR0 D6), T8 counts down
to 0 and stops, T8_OUT toggles, the time-out status bit
(CTR0 D5) is set, and a time-out interrupt can be generated if it is enabled (CTR0 D1) (Figure 22). In Modulo-N
Mode, upon reaching terminal count, T8_OUT is toggled,
but no interrupt is generated. Then T8 loads a new count
(if the T8_OUT level now is 0), TC8L is loaded; if it is 1,
TC8H is loaded. T8 counts down to 0, toggles T8_OUT,
sets the time-out status bit (CTR0 D5) and generates an
interrupt if enabled (CTR0 D1) (Figure 23). This completes
one cycle. T8 then loads from TC8H or TC8L according to
the T8_OUT level, and repeats the cycle.
The user can modify the values in TC8H or TC8L at any
time. The new values take effect when they are loaded.
Care must be taken not to write these registers at the time
the values are to be loaded into the counter/timer, to ensure known operation. An initial count of 1 is not allowed (a non-function will occur). An initial count of 0
will cause TC8 to count from 0 to %FF to %FE (Note, % is
used for hexadecimal values). Transition from 0 to %FF is
not a time-out condition.
Note: Using the same instructions for stopping the
counter/timers and setting the status bits is not recommended. Two successive commands, first stopping
the counter/timers, then resetting the status bits is necessary. This is required because it takes one counter/timer
clock interval for the initiated event to actually occur.
TC8H Counts
“Counter Enable” Command,
T8_OUT Switches To Its
Initial Value (CTR1 D1)
T8_OUT Toggles,
Time-Out Interrupt
Figure 19. T8_OUT in Single-Pass Mode
T8_OUT Toggles
T8_OUT
TC8L
“Counter Enable” Command,
T8_OUT Switches To Its
Initial Value (CTR1 D1)
TC8H
TC8L
Time-Out Interrupt
TC8H
TC8L
Time-Out Interrupt
Figure 20. T8_OUT in Modulo-N Mode
1-30
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
T8 Demodulation Mode
The user should program TC8L and TC8H to %FF. After
T8 is enabled, when the first edge (rising, falling, or both
depending on CTR1 D5, D4) is detected, it starts to count
down. When a subsequent edge (rising, falling, or both depending on CTR1 D5, D4) is detected during counting, the
current value of T8 is one's complemented and put into
one of the capture registers. If it is a positive edge, data is
put into LO8, if negative edge, HI8. One of the edge detect
status bits (CTR1 D1, D0) is set, and an interrupt can be
generated if enabled (CTR0 D2). Meanwhile, T8 is loaded
with %FF and starts counting again. Should T8 reach 0,
the time-out status bit (CTR0 D5) is set, an interrupt can be
generated if enabled (CTR0 D1), and T8 continues counting from %FF (Figure 21).
T8 (8-Bit)
Count Capture
No
T8_Enable
(Set By User)
Yes
Edge Present
No
Yes
What Kind Of Edge
Neg
Pos
T8 → L08
T8 → HI8
%FF → T8
Figure 21. Demodulation Mode Count Capture Flowchart
DS97LVO0500
PRELIMINARY
1-31
1
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
FUNCTIONAL DESCRIPTION (Continued)
T8 (8-Bit)
Transmit Mode
No
T8_Enable Bit Set
CTR0, D7
Reset T8_Enable Bit
Yes
0
1
CTR1, D1
Value
Load TC8L
Reset T8_OUT
Load TC8H
Set T8_OUT
Set Time-out Status Bit
(CTR0 D5) and Generate
Timeout_Int If Enabled
Enable T8
No
T8_Timeout
Yes
Single Pass
Single Pass?
Modulo-N
1
0
T8_OUT Value
Load TC8L
Reset T8_OUT
Load TC8H
Set T8_OUT
Enable T8
Set Time-out Status Bit
(CTR0 D5) and Generate
Timeout_Int If Enabled
No
T8_Timeout
Yes
Disable T8
Figure 22. Transmit Mode Flowchart
1-32
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
1
T8 (8-Bit)
Demodulation Mode
No
T8_Enable
CTR0, D7
Yes
%FF → TC8
Edge Present
No
Yes
Disable T8
Enable TC8
T8_Enable Bit Set
Yes
No
Edge Present
Yes
T8 Time Out
Set Edge Present Status
Bit And Trigger Data
Capture Int. If Enabled
No
Yes
Set Time-out Status
Bit And Trigger Time
Out Int. If Enabled
Continue Counting
Figure 23. Demodulation Mode Flowchart
DS97LVO0500
PRELIMINARY
1-33
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
FUNCTIONAL DESCRIPTION (Continued)
Z8 Data Bus
CTR2 D2
Pos Edge
IRQ3
Neg Edge
HI16
LO16
CTR2 D4, D3
SCLK
CTR2 D1
Clock
Select
Clock
16-Bit
Counter
T16
TC16H
T16_OUT
TC16L
Z8 Data Bus
Figure 24. 16-Bit Counter/Timer Circuits
T16 Transmit Mode
In Normal or Ping-Pong Mode, the output of T16 when not
enabled is dependent on CTR1, D0. If it is a 0, T16_OUT
is a 1; if it is a 1, T16_OUT is 0. The user can force the output of T16 to either a 0 or 1 whether it is enabled or not by
programming CTR1 D3, D2 to a 10 or 11.
When T16 is enabled, TC16H * 256 + TC16L is loaded,
and T16_OUT is switched to its initial value (CTR1 D0).
When T16 counts down to 0, T16_OUT is toggled (in Normal or Ping-Pong Mode), an interrupt is generated if enabled (CTR2 D1), and a status bit (CTR2 D5) is set. Note
that global interrupts will override this function as described in the interrupts section. If T16 is in Single-Pass
Mode, it is stopped at this point. If it is in Modulo-N Mode,
it is loaded with TC16H * 256 + TC16L and the counting
continues.
1-34
The user can modify the values in TC16H and TC16L at
any time. The new values take effect when they are loaded. Care must be taken not to load these registers at the
time the values are to be loaded into the counter/timer, to
ensure known operation. An initial count of 1 is not allowed. An initial count of 0 will cause T16 to count from 0
to %FFFF to %FFFE. Transition from 0 to %FFFF is not a
time-out condition.
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
TC16H*256+TC16L Counts
1
“Counter Enable” Command,
T16_OUT Switches To Its
Initial Value (CTR1 D0)
T16_OUT Toggles,
Time-Out Interrupt
Figure 25. T16_OUT in Single-Pass Mode
TC16H*256+TC16L
TC16H*256+TC16L
T16_OUT
“Counter Enable” Command,
T16_OUT Switches To Its
Initial Value (CTR1 D0)
TC16H*256+TC16L
T16_OUT Toggles,
Time-Out Interrupt
T16_OUT Toggles,
Time-Out Interrupt
Figure 26. T16_OUT in Modulo-N Mode
T16 Demodulation Mode
The user should program TC16L and TC16H to %FF. After
T16 is enabled, when the first edge (rising, falling, or both
depending on CTR1 D5, D4) is detected, T16 captures
HI16 and LO16 reloads and begins counting.
If D6 of CTR2 is 0: When a subsequent edge (rising, falling, or both depending on CTR1 D5, D4) is detected during
counting, the current count in T16 is one's complemented
and put into HI16 and LO16. When data is captured, one
of the edge detect status bits (CTR1 D1, D0) is set and an
interrupt is generated if enabled (CTR2 D2). T16 is loaded
with %FFFF and starts again.
DS97LVO0500
If D6 of CTR2 is 1: T16 ignores the subsequent edges in
the input signal and continues counting down. A time out
of T8 will cause T16 to capture its current value and generate an interrupt if enabled (CTR2, D2). In this case, T16
does not reload and continues counting. If D6 bit of CTR2
is toggled (by writing a 0 then a 1 to it), T16 will capture and
reload on the next edge (rising, falling, or both depending
on CTR1 D5, D4) but continue to ignore subsequent edges.
Should T16 reach 0, it continues counting from %FFFF;
meanwhile, a status bit (CTR2 D5) is set and an interrupt
time-out can be generated if enabled (CTR2 D1).
PRELIMINARY
1-35
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
FUNCTIONAL DESCRIPTION (Continued)
Ping-Pong Mode
This operation mode is only valid in Transmit Mode. T8
and T16 need to be programmed in Single-Pass Mode
(CTR0 D6, CTR2 D6) and Ping-Pong Mode needs to be
programmed in CTR1 D3, D2. The user can begin the operation by enabling either T8 or T16 (CTR0 D1 or CTR2
D7). For example, if T8 is enabled, T8_OUT is set to this
initial value (CTR1 D1). According to T8_OUT's level,
TC8H or TC8L is loaded into T8. After the terminal count
is reached, T8 is disabled and T16 is enabled. T16_OUT
switches to its initial value (CTR1 D0), data from TC16H
and TC16L is loaded, and T16 starts to count. After T16
reaches the terminal count it stops, T8 is enabled again,
and the whole cycle repeats. Interrupts can be allowed
when T8 or T16 reaches terminal control (CTR0 D1, CTR2
D1). To stop the Ping-Pong operation, write 00 to bits D3
and D2 of CTR1.
Note:Enabling Ping-Pong operation while the
counter/timers are running may cause intermittent
counter/timer function. Disable the counter/timers, then
reset the status flags prior to instituting this operation.
Enable
TC8
Time-Out
Enable
Ping-Pong
CTR1 D3,D2
TC16
Time-Out
Figure 27. Ping-Pong Mode
To Initiate Ping-Pong Mode
First, make sure both counter/timers are not running. Then
set T8 into Single-Pass Mode (CTR0 D6), set T16 into Single-Pass Mode (CTR2 D6), and set Ping-Pong Mode
(CTR1 D2, D3). These instructions do not have to be in
any particular order. Finally, start Ping-Pong Mode by enabling either T8 (CTR0 D7) or T16 (CTR2 D7).
1-36
During Ping-Pong Mode
The enable bits of T8 and T16 (CTR0 D7, CTR2 D7) will
be alternately set and cleared by hardware. The time-out
bits (CTR0 D5, CTR2 D5) will be set every time the
counter/timers reach the terminal count.
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
To Terminate Ping-Pong Mode
Change Transmit Mode to Normal Mode (CTR1 D2, D3).
Notice that Ping-Pong Mode is not actually stopped until
one of the timer/counter's time-out. Before the actual teror
loop_a:
tm
jr
Id
or
loop_b:
tm
jr
CTR0,#%20
;reset T8 time-out status bit
CTR0,#%20
z,loop_a
CTR1,#00000000b
CTR2,#%20
;wait until T8 times-out
;change to Normal Mode
;reset T16 time-out status bit
CTR2,#%20
z,loop_b
Id
Id
mination of Ping-Pong Mode, the user should not change
the value of CTR0 or CTR2, except for resetting the timeout status bit. Here is an example for terminating PingPong Mode safely:
CTR0,#00100000b
CTR2,#00100000b
;wait until T16 times-out
;now Ping-Pong Mode is actually
;terminated and user can re-program T8
;and T16
TC8H
TC8H
T8_OUT Toggles
T8_OUT
Enable T8,
T8_OUT Switches
To Its Initial Value
TC16H*256+TC16L
T8_OUT Toggles
TC16H*256+TC16L
T16_OUT Toggles
T16_OUT
T16_OUT
T16_OUT Switches To Its Initial
Value When TC16 Is Enabled
Figure 28. T8_OUT and T16_OUT in Ping-Pong Mode
DS97LVO0500
PRELIMINARY
1-37
1
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
FUNCTIONAL DESCRIPTION (Continued)
P34_INTERNAL
MUX
P34_EXT
CTR0 D0
P36_INTERNAL
T8_OUT
T16_OUT
CTR1, D2
AND/OR/NOR/NAND
Logic
MUX
P36_EXT
MUX
CTR1 D6
CTR1 D5,D4
CTR1 D3
P35_INTERNAL
MUX
P35_EXT
CTR2 D0
Figure 29. Output Circuit
1-38
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
Interrupts. The Z86L7X has five different interrupts. The
interrupts are maskable and prioritized (Figure 30). The
five sources are divided as follows: three sources are
claimed by Port 3 lines P33-P31, the remaining two by the
counter/timers (Table 3). The Interrupt Mask Register globally or individually enables or disables the five interrupt
requests.
IRQ0
IRQ2
IRQ 1, 3, 4
Interrupt
Edge
Select
IRQ Register (D6, D7)
IRQ
IMR
5
Global
Interrupt
Enable
Interrupt
Request
IPR
Priority
Logic
Vector Select
Figure 30. Interrupt Block Diagram
DS97LVO0500
PRELIMINARY
1-39
1
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
FUNCTIONAL DESCRIPTION (Continued)
Table 3. Interrupt Types, Sources, and Vectors
Name
Source
Vector
Location
IRQ0
/DAV0, IRQ0
0, 1
IRQ1,
IRQ1
2, 3
IRQ2
/DAV2, IRQ2,
TIN
4, 5
IRQ3
IRQ4
T16
T8
6, 7
8, 9
Comments
External (P32),
Rising Falling Edge
Triggered
External (P33),
Falling Edge
Triggered
External (P31),
Rising Falling Edge
Triggered
Internal
Internal
When more than one interrupt is pending, priorities are resolved by a programmable priority encoder controlled by
the Interrupt Priority register. An interrupt machine cycle is
activated when an interrupt request is granted. This disables all subsequent interrupts, saves the Program
Counter and Status Flags, and then branches to the program memory vector location reserved for that interrupt.
All Z86L7X interrupts are vectored through locations in the
program memory. This memory location and the next byte
contain the 16-bit address of the interrupt service routine
for that particular interrupt request. To accommodate
polled interrupt systems, interrupt inputs are masked and
the Interrupt Request register is polled to determine which
of the interrupt requests need service.
An interrupt resulting from AN1 (P31) is mapped into IRQ2,
and an interrupt from AN2 (P32) is mapped into IRQ0. Interrupts IRQ2 and IRQ0 may be rising, falling, or both edge
triggered, and are programmable by the user. The software can poll to identify the state of the pin.
1-40
Programming bits for the Interrupt Edge Select are located
in the IRQ Register (R250), bits D7 and D6 . The configuration is shown in Table 4.
Table 4. IRQ Register
IRQ
Interrupt Edge
D7
D6
IRQ2 (P31)
IRQ0 (P32)
0
0
1
1
0
1
0
1
F
F
R
R/F
F
R
F
R/F
Notes:
F = Falling Edge
R = Rising Edge
In analog mode, the Stop-Mode Recovery sources selected by
the SMR register are connected to the IRQ1 input. Any of the
Stop-Mode Recovery sources for SMR (except P31, P32, and
P33) can be used to generate IRQ1 (falling edge triggered)
Clock. The Z86L7X on-chip oscillator has a high-gain, parallel-resonant amplifier for connection to a crystal, LC, ceramic resonator, or any suitable external clock source
(XTAL1 = Input, XTAL2 = Output). The crystal should be
AT cut, 1 MHz to 8 MHz maximum, with a series resistance
(RS) less than or equal to 100 Ohms. The Z86L7X on-chip
oscillator may be driven with a cost-effective RC network
or other suitable external clock source.
The crystal should be connected across XTAL1 and
XTAL2 using the recommended capacitors (capacitance
greater than or equal to 22 pF) from each pin to ground.
The RC oscillator configuration is an external resistor connected from XTAL1 to XTAL2, with a frequency-setting capacitor from XTAL1 to ground (Figure 8).
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
Power-On Reset (POR). A timer circuit clocked by a dedicated on-board RC oscillator is used for the Power-On Reset (POR) timer function. The POR time allows VCC and
the oscillator circuit to stabilize before instruction execution begins.
1. Power Fail to Power OK status.
The POR timer circuit is a one-shot timer triggered by one
of three conditions:
The POR time is a nominal 5 ms. Bit 5 of the Stop-Mode
Register determines whether the POR timer is bypassed
after Stop-Mode Recovery (typical for external clock, RC,
LC oscillators).
XTAL1
C1
2. Stop-Mode Recovery (if D5 of SMR = 1).
XTAL1
XTAL1
XTAL1
XTAL2
XTAL2
C1
C1
R
L
XTAL2
C2
1
3. WDT Time-Out.
XTAL2
C2
Ceramic Resonator or Crystal
C1, C2 = 47 pF TYP *
f = 8 MHz
* Preliminary value including pin parasitics
LC
C1, C2 = 22 pF
RC
@ 3V VCC (TYP)
L = 130 µH *
f = 3 MHz *
C1 = 33 pF *
R = 1K *
External Clock
Figure 31. Oscillator Configuration
DS97LVO0500
PRELIMINARY
1-41
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
FUNCTIONAL DESCRIPTION (Continued)
HALT. HALT turns off the internal CPU clock, but not the
XTAL oscillation. The counter/timers and external interrupts IRQ0, IRQ1, IRQ2, IRQ3, and IRQ4 remain active.
The devices are recovered by interrupts, either externally
or internally generated. An interrupt request must be executed (enabled) to exit HALT Mode. After the interrupt service routine, the program continues from the instruction after the HALT.
STOP. This instruction turns off the internal clock and external crystal oscillation and reduces the standby current
to 10 µA or less. STOP Mode is terminated only by a reset,
such as WDT time-out, POR, SMR, or external reset. This
causes the processor to restart the application program at
address 000CH. In order to enter STOP (or HALT) mode,
it is necessary to first flush the instruction pipeline to avoid
suspending execution in mid-instruction. To do this, the
user must execute a NOP (opcode = FFH) immediately before the appropriate sleep instruction, i.e.,
FF
6F
FF
7F
NOP
STOP
or
NOP
HALT
; clear the pipeline
; enter STOP Mode
; clear the pipeline
; enter HALT Mode
Port Configuration Register (PCON). The PCON register configures the comparator output on Port 3. It is located in the expanded register file at Bank F, location 00 (Figure 32).
PCON (FH) 00H
D7 D6 D5
D4 D3 D2 D1 D0
Comparator Output Port 3
0 P34,Standard Output*
1 P34,Comparator Output
Reserved (Must be 1)
* Default Setting After Reset
Figure 32. Port Configuration Register (PCON)
(Write Only)
1-42
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
Comparator Output Port 3 (D0). Bit 0 controls the comparator used in Port 3. A 1 in this location brings the comparator outputs to P34 and P37, and a 0 releases the Port
to its standard I/O configuration.
Stop-Mode Recovery Register (SMR). This register selects the clock divide value and determines the mode of
Stop-Mode Recovery (Figure 33). All bits are write only ex-
cept bit 7, which is read only. Bit 7 is a flag bit that is hardware set on the condition of STOP recovery and reset by
a power-on cycle. Bits D2, D3, and D4, of the SMR register, specify the source of the Stop-Mode Recovery signal.
Bit D0 determines if SCLK/TCLK are divided by 16 or not.
The SMR is located in Bank F of the Expanded Register
Group at address 0BH.
SMR (0F) 0B
D7 D6 D5 D4 D3 D2 D1 D0
SCLK/TCLK Divide-by-16
0 OFF **
1 ON
Reserved (Must be 0)
Stop-Mode Recovery Source
000 POR Only *
001 Reserved
010 P31
0 11 P32
100 P33
101 P27
11 0 P2 NOR 0-3
111 P2 NOR 0-7
Stop Delay
0 OFF
1 ON *
Reserved
0 Low *
Reserved Must be 0
Stop Flag
0 POR *
1 Stop Recovery * *
* Default Setting After Reset
** Default Setting After Reset and Stop-Mode Recovery
Figure 33. Stop-Mode Recovery Register
DS97LVO0500
PRELIMINARY
1-43
1
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
FUNCTIONAL DESCRIPTION (Continued)
SMR2 D4 D3 D2
0 0 0
SMR D4 D3 D2
0 0 0
VCC
VCC
SMR2 D4 D3 D2
0 0 1
SMR D4 D3 D2
0 1 0
P20
P31
S1
P23
SMR2 D4 D3 D2
0 1 0
SMR D4 D3 D2
0 1 1
P20
P32
S2
P27
SMR2 D4 D3 D2
0 1 1
SMR D4 D3 D2
1 0 0
P33
S3
P31
P32
P33
To IRQ1
SMR2 D4 D3 D2
1 0 0
S4
SMR D4 D3 D2
1 0 1
P31
P32
P33
P27
SMR D4 D3 D2
1 1 0
P31
P32
P33
P00
P07
P20
P23
SMR D4 D3 D2
1 1 1
P31
P32
P33
P00
P07
P20
P27
SMR D6
(= 0)
P31
P32
P33
P20
P21
P22
To RESET and WDT
Circuitry (Active Low)
SMR2 D4 D3 D2
1 0 1
SMR2 D4 D3 D2
1 1 0
SMR2 D4 D3 D2
1 1 1
SMR2 D6
Figure 34. Stop-Mode Recovery Source
1-44
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
SCLK/TCLK Divide-by-16 Select (D0). D0 of the SMR
controls a Divide-by-16 prescaler of SCLK/TCLK. The purpose of this control is to selectively reduce device power
consumption during normal processor execution (SCLK
control) and/or HALT Mode (where TCLK sources interrupt
logic). After Stop-Mode Recovery, this bit is set to a 0.
÷2
Stop-Mode Recovery Edge Select (D6). A 1 in this bit position indicates that a High level on any one of the recovery
sources wakes the Z86L7X from STOP Mode. A 0 indicates Low level recovery. The default is 0 on POR (Figure
36).
SCLK
SMR, D0
TCLK
Figure 35. SCLK Circuit
Stop-Mode Recovery Source (D2, D3, and D4). These
three bits of the SMR specify the wake up source of the
STOP recovery (Figure 36 and Table 5).
Operation
D4
D3
D2
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
DS97LVO0500
Cold or Warm Start (D7). This bit is set by the device
upon entering STOP Mode. It is a Read Only Flag bit. A 1
in D7 (warm) indicates that the device will awaken from a
SMR source or a WDT while in STOP Mode. A 0 in this bit
(cold) indicates that the device will be reset by a POR,
WDT while not in STOP, or the device awakened a low
voltage standby mode.
Stop-Mode Recovery Register 2 (SMR). This register
determines the mode of the Stop-Mode Recovery for
SMR2.
Table 5. Stop-Mode Recovery Source
SMR:432
Note: Port pins defined as an output will drive the corresponding input to the default state to allow the remaining
inputs to control the AND/OR function. Refer to SMR2 register for other recover sources.
Stop-Mode Recovery Delay Select (D5). This bit, if Low,
disables the 5 ms /RESET delay after Stop-Mode Recovery. The default configuration of this bit is one. If the "fast"
wake up is selected, the Stop-Mode Recovery source
needs to be kept active for at least 5TpC.
OSC
÷ 16
P33-P31 cannot wake up from STOP Mode if the input
lines are configured as analog input.
Description of Action
POR and/or external reset recovery
Reserved
P31 transition
P32 transition
P33 transition
P27 transition
Logical NOR of P20 through P23
Logical NOR of P20 through P27
If SMR2 is used in conjunction with SMR, either of the
specified events will cause a Stop-Mode Recovery.
PRELIMINARY
1-45
1
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
FUNCTIONAL DESCRIPTION (Continued)
SMR2 (0F) 0DH
D7 D6 D5 D4 D3 D2 D1 D0
Reserved (Must be 0)
Reserved (Must be 0)
Stop-Mode Recovery Source 2
000 POR only*
001 NAND P20, P21, P22, P23
010 NAND P20, P21, P22, P23, P24, P25, P26, P27
011 NOR P31, P32, P33
100 NAND P31, P32, P33
101 NOR P31, P32, P33, P00, P07
110 NAND P31, P32, P33, P00, P07
111 NAND P31, P32, P33, P20, P21, P22
Reserved
(Must be 0)
Recovery Level
0 Low*
1 High
Reserved (Must be 0)
Note: If used in conjunction with SMR,
either of the two specified events will
cause a Stop-Mode Recovery.
*Default Setting After Reset
Figure 36. Stop-Mode Recovery Register 2
((0F) 0DH: D2-D4: D6 Write Only)
1-46
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
Watch-Dog Timer Mode Register (WDTMR). The WDT
is a retriggerable one-shot timer that resets the Z8 if it
reaches its terminal count. The WDT must initially be enabled by executing the WDT instruction and refreshed on
subsequent executions of the WDT instruction. The WDT
circuit is driven by an on-board RC oscillator or external
oscillator from the XTAL1 pin. The WDT instruction affects
the Zero (Z), Sign (S), and Overflow (V) flags.
The POR clock source is selected with bit 4 of the WDT
register. Bit 0 and 1 control a tap circuit that determines the
time-out period. Bit 2 determines whether the WDT is active during HALT and Bit 3 determines WDT activity during
STOP. Bits 5 through 7 are reserved (Figure 37). This register is accessible only during the first 64 processor cycles
(128 XTAL clocks) from the execution of the first instruction after Power-On-Reset, Watch-Dog Reset, or a StopMode Recovery (Figure 40). After this point, the register
cannot be modified by any means, intentional or otherwise. The WDTMR cannot be read and is located in Bank
F of the Expanded Register Group at address location
0FH. It is organized as follows:
WDTMR (0F) 0F
D7 D6 D5 D4 D3 D2 D1 D0
WDT TAP
00
01 *
10
11
INT RC OSC External Clock
5 ms
256 TpC
10 ms
512 TpC
20 ms
1024 TpC
80 ms
4096 TpC
WDT During HALT
0 OFF
1 ON *
WDT During STOP
0 OFF
1 ON *
XTAL1/INT RC Select for WDT
0 On-Chip RC *
1 XTAL
Reserved (Must be 0)
* Default Setting After Reset
Figure 37. Watch-Dog Timer Mode Register
(Write Only)
DS97LVO0500
PRELIMINARY
1-47
1
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
FUNCTIONAL DESCRIPTION (Continued)
WDT Time Select (D0, D1). Selects the WDT time period.
It is configured as shown in Table 6.
Table 6. WDT Time Select
D1
D0
Time-Out of
Internal RC OSC
Time-Out of
XTAL Clock
0
0
1
1
0
1
0
1
5 ms min
10 ms min
20 ms min
80 ms min
256 TpC
512 TpC
1024 TpC
4096 TpC
Notes:
1. TpC = XTAL clock cycle.
2. The default on reset is 10 ms.
WDTMR During STOP (D3). This bit determines whether
or not the WDT is active during STOP Mode. Since the
XTAL clock is stopped during STOP Mode, the on-board
RC has to be selected as the clock source to the
WDT/POR counter. A 1 indicates active during STOP. The
default is 1.
Clock Source for WDT (D4). This bit determines which
oscillator source is used to clock the internal POR and
WDT counter chain. If the bit is a 1, the internal RC oscillator is bypassed and the POR and WDT clock source is
driven from the external pin, XTAL1. The default configuration of this bit is 0, which selects the RC oscillator.
WDTMR During HALT (D2). This bit determines whether
or not the WDT is active during HALT Mode. A 1 indicates
active during HALT. The default is 1.
1-48
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
/RESET
5 Clock
Filter
* /CLR 2
CLK
18 Clock RESET
Generator
1
RESET
Internal
RESET
Active
High
WDT TAP SELECT
CK Source
Select
(WDTMR)
XTAL
M
U
X
INTERNAL
RC
OSC.
VDD
VBO/VLV
2V REF.
+
-
POR
3
4
WDT1 2
CLK
WDT/POR Counter Chain
*/CLR1
Low Operating
Voltage Det.
VCC
WDT
From Stop
Mode
Recovery
Source
12 ns Glitch Filter
Stop Delay
Select (SMR)
* /CLR1 and /CLR2 enable the WDT/POR and
18 Clock Reset timers upon a Low to High input transition.
Figure 38. Resets and WDT
DS97LVO0500
PRELIMINARY
1-49
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
FUNCTIONAL DESCRIPTION (Continued)
Low Voltage Detection/Protection. An on-chip Voltage
Comparator checks that the VCC is at the required level for
correct operation of the device. Reset is globally driven
when VCC falls below VLV (Vrf1).
Mask Selectable Options. There are six Mask Selectable
Options to choose from based on ROM code requirements.
On/WDT command invoked
On/Off
On/Off
On/Off
On/Off
On/Off
On/Off
The device is guaranteed to function normally until the Low
Voltage Protection trip point VLV is reached, below which
reset is globally driven. The device is guaranteed to function normally at supply voltages above the VLV trip point for
the temperatures and operating frequencies in maximum
VLV conditions. The actual VLV trip point is a function of
temperature and process parameters (Figure 39).
1.8
1.6
1.4
VLV
1.2
VLV
Permanent Watch-Dog
Timer
RAM Protect
ROM Protect
32 kHz XTAL
Port 00-07 Pull-ups
Port 31-33 Pull-ups
Port 20-27 Pull-ups
Note: The internal clock frequency is one-half the external
clock frequency.
Note: Internal Port 0/Pull-Up resistors remain connected
when port pins are configured as outputs.
1
0.8
0.6
0.4
The Low Voltage trip voltage (VLV) is less than 2.1V under
the following conditions:
0.2
0
0
Maximum (VLV) Conditions:
TA = 0°C, +55°C Internal clock frequency equal to or less
than 4.0 MHz
1-50
15
35
25
Temperature
45
55
Figure 39. Typical Z86L7X Low Voltage vs
Temperature at 8 MHz
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
EXPANDED REGISTER FILE CONTROL REGISTERS (0D)
1
CTR0 (0D) 0H
D7 D6 D5 D4 D3 D2 D1 D0
0 P34 as Port Output
1 Timer8 Output
0 Disable T8 Time Out Interrupt
1 Enable T8 Time Out Interrupt
0 Disable T8 Data Capture Interrupt
1 Enable T8 Data Capture Interrupt
00
01
10
11
R
R
W
W
SCLK on T8
SCLK/2 on T8
SCLK/4 on T8
SCLK/8 on T8
0 No T8 Counter Time Out
1 T8 Counter Time Out Occured
0 No Effect
1 Reset Flag to 0
0 Modulo-N
1 Single Pass
* Default Setting After Reset
R
R
W
W
0
1
0
1
T8 Disabled *
T8 Enabled
Stop T8
Enable T8
Figure 40. TC8 Control Register
((0D) 0H: Read/Write Except Where Noted)
DS97LVO0500
PRELIMINARY
1-51
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
CTR1 (0D) 1H
D7
D6
D5
D4
D3
D2
D1
D0
Transmit Mode
R/W 0 T16_OUT is 0 Initially
1 T16_OUT is 1 Initially
Demodulation Mode
R
0 No Falling Edge Detection
R
1 Falling Edge Detection
W
W
0 No Effect
1 Reset Flag to 0
Transmit Mode
R/W 0 T8_OUT is 0 Initially
1 T8_OUT is 1 Initially
Demodulation Mode
0 No Rising Edge Detection
R
1 Rising Edge Detection
R
0 No Effect
W
1 Reset Flag to 0
W
Transmit Mode
0 0 Normal Operation
0 1 Ping-Pong Mode
1 0 T16_OUT = 0
1 1 T16_OUT = 1
Demodulation Mode
0 0 No Filter
0 1 4 SCLK Cycle Filter
1 0 8 SCLK Cycle Filter
1 1 16 SCLK Cycle Filter
Transmit Mode/T8/T16 Logic
0 0 AND
0 1 OR
1 0 NOR
1 1 NAND
Demodulation Mode
0 0 Falling Edge Detection
0 1 Rising Edge Detection
1 0 Both Edge Detection
1 1 Reserved
Transmit Mode
0 P36 as Port Output *
1 P36 as T8/T16_OUT
Demodulation Mode
0 P31 as Demodulator Input
1 P20 as Demodulator Input
Transmit/Demodulation Modes
0 Transmit Mode *
1 Demodulation Mode
Note: Care must be taken in differentiating
Transmit Mode from Demodulation Mode.
Depending on which of these two modes is
operating, the CTR1 bit will have different
functions.
*Note: Changing from one mode to
another cannot be done without
disabling the counter/timers.
Figure 41. T8 and T16 Common Control Functions
((0D) 1H: Read/Write)
1-52
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
CTR2 (0D) 02H
1
D7 D6 D5 D4 D3 D2 D1 D0
0
1
0
1
P35 is Port Output
P35 is TC16 Output
Disable T16 Time-Out Interrupt
Enable T16 Time-Out Interrupt
0 Disable T16 Data Capture Interrupt
1 Enable T16 Data Capture Interrupt
00
01
10
11
R
R
W
W
SCLK on T16
SCLK/2 on T16
SCLK/4 on T16
SCLK/8 on T16
0
1
0
1
No T16 Time Out
T16 Time Out Occurs
No Effect
Reset Flag to 0
Transmit Mode
0 Modulo-N for T16
1 Single Pass for T16
Demodulator Mode
0 T16 Recognizes Edge
1 T16 Does Not Recognize Edge
* Default Setting After Reset
R
R
W
W
0
1
0
1
T16 Disabled *
T16 Enabled
Stop T16
Enable T16
Figure 42. T16 Control Register
((0D) 2H: Read/Write Except Where Noted)
DS97LVO0500
PRELIMINARY
1-53
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
EXPANDED REGISTER FILE CONTROL REGISTERS (0D) (Continued)
SMR (F) 0B
D7 D6 D5 D4 D3 D2 D1 D0
SCLK/TCLK Divide-by-16
0 OFF **
1 ON
Reserved (Must be 0)
Stop-Mode Recovery Source
000 POR Only *
001 Reserved
010 P31
0 11 P32
100 P33
101 P27
11 0 P2 NOR 0-3
111 P2 NOR 0-7
Stop Delay
0 OFF
1 ON *
Reserved (Must be 0)
Stop Flag
0 POR
1 Stop Recovery**
* Default Setting After Reset
** Default Setting After Reset and Stop-Mode Recovery
Figure 43. Stop-Mode Recovery Register
((F) 0BH: D6-D0 = Write Only, D7 = Read Only)
1-54
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
SMR2 (0F) 0DH
1
D7 D6 D5 D4 D3 D2 D1 D0
Reserved (Must be 0)
Reserved (Must be 0)
Stop-Mode Recovery Source 2
000 POR only*
001 NAND P20, P21, P22, P23
010 NAND P20, P21, P22, P23, P24, P25, P26, P27
011 NOR P31, P32, P33
100 NAND P31, P32, P33
101 NOR P31, P32, P33, P00, P07
110 NAND P31, P32, P33, P00, P07
111 NAND P31, P32, P33, P20, P21, P22
Reserved
(Must be 0)
Recovery Level
0 Low*
1 High
Reserved (Must be 0)
Note: If used in conjunction with SMR,
either of the two specified events will
cause a Stop-Mode Recovery.
*Default Setting After Reset
Figure 44. Stop-Mode Recovery Register 2
((0F) 0DH: D2-D4, D6 Write Only)
DS97LVO0500
PRELIMINARY
1-55
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
EXPANDED REGISTER FILE CONTROL REGISTERS (0D) (Continued)
WDTMR (0F) 0F
D7 D6 D5 D4 D3 D2 D1 D0
WDT TAP
00
01 *
10
11
INT RC OSC External Clock
5 ms
256 TpC
10 ms
512 TpC
20 ms
1024 TpC
80 ms
4096 TpC
WDT During HALT
0 OFF
1 ON *
WDT During STOP
0 OFF
1 ON *
XTAL1/INT RC Select for WDT
0 On-Chip RC *
1 XTAL
Reserved (Must be 0)
* Default Setting After Reset
Figure 45. Watch-Dog Timer Mode Register
((F) OFH: Write Only)
PCON (0F) 00H
D7 D6 D5
D4 D3 D2 D1 D0
Comparator Output Port 3
0 P34,Standard Output*
1 P34,Comparator Output
Reserved (Must be 0)
* Default Setting After Reset
Figure 46. Port Configuration Register (PCON)
((0F) OH: Write Only)
1-56
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
Z8 STANDARD CONTROL REGISTER DIAGRAMS
1
R246 P2M
R247 P3M
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
0 Port 2 Open Drain*
1 Port 2 Push-pull
*Default Setting After Reset
0 = P31, P32 Digital Mode
1 = P31, P32 Analog Mode
0 P32 = Input
P35 = Output **
1 P32 = /DAV0/RDY0
P35 = RDY0//DAV0
00
01
10
11
P33 = Input
P34 = Output **
P33 = Input
P34 = /DM
P33 = /DAV1/RDY1
P34 = RDY1//DAV1
P27-P20 I/O Definition
0 Defines Bit as OUTPUT
1 Defines Bit as INPUT*
Figure 49. Port 2 Mode Register
(F8H: Write Only)
D7 D6 D5 D4 D3 D2 D1 D0
0 P31 = Input (TIN)
P36 = Output (TOUT)
1 P31 = /DAV2/RDY2
P36 = RDY2//DAV2
Reserved (Must be 0)
* Default Setting After Result
Note: D0 affects P34, P35 as well as Port 2.
Interrupt Group Priority
000 Reserved
001 C>A>B
010 A>B>C
011 A>C>B
100 B>C>A
101 C>B>A
110 B>A>C
111 Reserved
IRQ1,IRQ4,Priority
(Group C)
0 IRQ1>IRQ4
1 IRQ4>IRQ1
Figure 47. Port 3 Mode Register
(F7H: Write Only)
IRQ0,IRQ2
Priority (Group B)
0 IRQ2>IRQ0
1 IRQ0>IRQ2
R248 P01M
D7 D6 D5 D4 D3 D2 D1 D0
P00-P03 Mode
00 Output
01 Input*
1X A11-A8
IRQ3,IRQ5Priority
(Group A)
0 IRQ5>IRQ3
1 IRQ3>IRQ5
Stack Selection
0 External
1 Internal*
Reserved (Must be 0)
Reserved (Must be 0)
External Memory Timing
0 Normal*
1 Extended
Figure 50. Interrupt Priority Register
((0) F9H: Write Only)
P07-P04 Mode
00 Output
01 Input*
1X A15-A12
* Default Setting After Reset.
Note: Only P00 and P07 are Available on Z86L71.
Figure 48. Port 0 and 1 Mode Register
(F8H: Write Only)
DS97LVO0500
PRELIMINARY
1-57
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
R253 RP
R250 IRQ
D7 D6
D5
D4
D3
D2
D1
D7 D6 D5 D4 D3 D2 D1 D0
D0
IRQ0 = P32 Input
IRQ1 = P33 Input
IRQ2 = P31 Input
IRQ3 = T16_OUT
IRQ4 = T8_OUT
Expanded Register
Pointer
Default Setting After
Reset = 0000 0000
Working Register
Pointer
Reserved (Must be 0)
Inter Edge
P31 ↓ P32 ↓ = 00
P31 ↓ P32 ↑ = 01
P31 ↑ P32 ↓ = 10
P31 ↑↓ P32 ↑↓ = 11
Default Setting After Reset = 0000 0000
Figure 54. Register Pointer
((0) FDH: Read/Write)
R254 SPH
D7 D6 D5 D4 D3 D2 D1 D0
Figure 51. Interrupt Request Register
((0) FAH: Read/Write)
Stack Pointer Upper
Byte (SP15-SP8)
R251 IMR
Figure 55. Stack Pointer High
((0) FEH: Read/Write)
D7 D6 D5 D4 D3 D2 D1 D0
1 Enables IRQ4-IRQ0
(D0 = IRQ0)
Reserved (Must be 0)
R255 SPL
Reserved (Must be 0)
D7 D6 D5 D4 D3 D2 D1 D0
0 Master Interrupt Disable*
1 Master Interrupt Enable
* Default Setting After Reset
Figure 52. Interrupt Mask Register
((0) FBH: Read/Write)
Stack Pointer Lower
Byte (SP7-SP0)
Figure 56. Stack Pointer Low
((0) FFH: Read/Write)
R252 FLAGS
D7 D6 D5 D4 D3 D2 D1 D0
User Flag F1
User Flag F2
Half Carry Flag
Decimal Adjust Flag
Overflow Tag
Sign Flag
Zero Flag
Carry Flag
Figure 53. Flag Register
((0) FCH: Read/Write)
1-58
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
PACKAGE INFORMATION
1
Figure 57. 18-Pin DIP Pin Assignments
Figure 58. 20-Pin DIP Pin Assignments
DS97LVO0500
PRELIMINARY
1-59
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
Figure 59. 18-Pin SOIC Pin Assignments
Figure 60. 20-Pin SOIC Pin Assignments
1-60
PRELIMINARY
DS97LVO0500
Z86L70/71/75/C71
IR/Low-Voltage Microcontroller
Zilog
ORDERING INFORMATION
Z86L70/71/75/C71
Codes
8.0 MHz
18-pin DIP
Z86L7008PSC
Z86L7508PSC
Package
18-pin SOIC
Z86L7008SSC
Z86L7508SSC
20-pin DIP
Z86L7108PSC
1
P = Plastic DIP
S = SOIC (Small Outline Chip Carrier)
Temperature
20-pin SOIC
Z86L7108SSC
Standard = 0 °C to +70 °C
Environmental
16.0 MHz
20-pin DIP
Z86C7116PSC
C = Plastic Standard
Example:
Z 86L71 08 P S C
is a Z86L71, 8 MHz, DIP, 0°C to +70°C, Plastic Standard Flow
Environmental Flow
Temperature
Package
Speed
Product Number
Zilog Prefix
© 1997 by Zilog, Inc. All rights reserved. No part of this
document may be copied or reproduced in any form or by
any means without the prior written consent of Zilog, Inc.
The information in this document is subject to change
without notice. Devices sold by Zilog, Inc. are covered by
warranty and patent indemnification provisions appearing
in Zilog, Inc. Terms and Conditions of Sale only. Zilog, Inc.
makes no warranty, express, statutory, implied or by
description, regarding the information set forth herein or
regarding the freedom of the described devices from
intellectual property infringement. Zilog, Inc. makes no
warranty of merchantability or fitness for any purpose.
Zilog, Inc. shall not be responsible for any errors that may
appear in this document. Zilog, Inc. makes no commitment
to update or keep current the information contained in this
document.
DS97LVO0500
Zilog’s products are not authorized for use as critical
components in life support devices or systems unless a
specific written agreement pertaining to such intended use
is executed between the customer and Zilog prior to use.
Life support devices or systems are those which are
intended for surgical implantation into the body, or which
sustains life whose failure to perform, when properly used
in accordance with instructions for use provided in the
labeling, can be reasonably expected to result in
significant injury to the user.
Zilog, Inc. 210 East Hacienda Ave.
Campbell, CA 95008-6600
Telephone (408) 370-8000
FAX 408 370-8056
Internet: http://www.zilog.com
PRELIMINARY
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