ETC WT62P1

WT62P1
Data Sheet Rev. 1.01
GENERAL DESCRIPTION
The WT62P1 is a microcontroller for digital controlled monitor with Universal Serial Bus (USB) interface.
It contains an 8-bit CPU, 32K bytes flash memory, 512 bytes RAM, 14 PWMs, parallel I/Os, SYNC signal
2
processor, timer, DDC1/2B interface, master/slave I C interface, low speed USB device module, 6-bit
A/D converter and watch-dog timer.
FEATURES
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8-bit 6502 compatible CPU with 6MHz operating frequency
32768 bytes flash memory, 512 bytes SRAM
12MHz crystal oscillator
14 channels 8-bit PWM outputs
Sync signal processor with H+V separation, H/V frequency counter, H/V polarity detection/control and
clamp pulse output
Six free-running sync signal outputs (Horizontal frequency up to 106KHz)
Self-test pattern
DDC1/2B supported
2
Fast mode master/slave I C interface (up to 400KHz)
Embedded USB function with endpoint 0 and endpoint 1
Built-in 3.3V regulator for USB tranceiver
Watch-dog timer
Maximum 28 programmable I/O pins
One 8-bit programmable timer
6-bit A/D converter with 4 selectable inputs
One external interrupt request input
Low VDD reset
ORDERING INFORMATION
Package Type
Part Number
42-pin PDIP
WT62P1-N42
42-pin Shrink PDIP
WT62P1-K42
40-pin PDIP
WT62P1-N40
28-pin skinny PDIP
WT62P1-N28
44-pin SOP
WT62P1-S44
Weltrend Semiconductor, Inc.
Page 2
WT62P1
Data Sheet Rev. 1.01
PIN CONFIGURATION
42-pin PDIP
42-pin SPDIP
40-pin PDIP
D+
1
42
D-
PWM2
2
41
VIN
PWM2
1
40
VIN
PWM1
3
40
HIN
PWM1
2
39
HIN
PWM0
4
39
PWM3
PWM0
3
38
PWM3
RESET/3V3
5
38
PD5/PWM4
RESET/3V3
4
37
PD5/PWM4
VDD
6
37
PD4/PWM5
VDD
5
36
PD4/PWM5
GND
7
36
PD3/PWM6
GND
6
35
PD3/PWM6
OSCO
8
35
PD2/PWM7
OSCO
7
34
PD2/PWM7
OSCI
9
34
PD1/HOUT
OSCI
8
33
PD1/HOUT
32
PD0/VOUT
31
PA7/PWM13/CLAMP
PB5/SDA2
10
WT62P1-N42
33
PD0/VOUT
PB5/SDA2
9
PB4/SCL2
11
WT62P1-K42
32
PA7/PWM13/CLAMP
PB4/SCL2
10
PB3/PAT
12
31
PA6/PWM12
PB3/PAT
11
30
PA6/PWM12
PB2
13
30
PA5/PWM11
PB2
12
29
PA5/PWM11
PB1/HFI
14
29
PA4/PWM10
PB1/HFI
13
28
PA4/PWM10
PB0/HFO
15
28
PA3/PWM9
PB0/HFO
14
27
PA3/PWM9
IRQ
16
27
PA2/PWM8
IRQ
15
26
PA2/PWM8
PC7/SOGIN
17
26
PA1/SCL1
PC7/SOGIN
16
25
PA1/SCL1
PC6
18
25
PA0/SDA1
PC6
17
24
PA0/SDA1
PC5
19
24
PC0/AD0
PC5
18
23
PC0/AD0
PC4
20
23
PC1/AD1
PC4
19
22
PC1/AD1
PC3/AD3
21
22
PC2/AD2
PC3/AD3
20
21
PC2/AD2
D-
WT62P1-N40
44-pin SOP
D+
1
44
PWM2
2
43
VIN
PWM1
3
42
HIN
28-pin Skinny PDIP
PWM0
4
41
PWM3
RESET/3V3
5
40
PD5/PWM4
VDD
6
39
PD4/PWM5
7
38
GND
8
37
PD3/PWM6
OSCO
9
36
PD2/PWM7
OSCI
10
35
PD1/HOUT
PB5/SDA2
11
34
PD0/VOUT
PB4/SCL2
12
33
PA7/PWM13/CLAMP
PB3/PAT
13
32
PA6/PWM12
PB2
14
31
PA5/PWM11
PB1/HFI
15
30
PA4/PWM10
PB0/HFO
16
29
PA3/PWM9
IRQ
17
28
PA2/PWM8
PC7/SOGIN
18
27
PA1/SCL1
PC6
19
26
PA0/SDA1
PC5
20
25
PC0/AD0
PC4
21
24
PC1/AD1
PC3/AD3
22
23
PC2/AD2
WT62P1-S44
PA5/PWM11
1
28
PA4/PWM10
PA6/PWM12
2
27
PA3/PWM9
PA7/PWM13/CLAMP
3
26
PA2/PWM8
PD0/VOUT
4
25
PA1/SCL1
PD1/HOUT
5
24
PA0/SDA1
HIN
6
23
PC0/AD0
VIN
7
22
PC1/AD1
RESET/3V3
8
21
PC2/AD2
VDD
9
20
PC3/AD3
GND
10
19
PC4
OSCO
11
18
PC5
OSCI
12
17
PC6
PB5/SDA2
13
16
PC7
PB4/SCL2
14
15
IRQ
Weltrend Semiconductor, Inc.
Page 3
WT62P1-N28
WT62P1
Data Sheet Rev. 1.01
PIN DESCRIPTION
Pin No.
44 42 40 28
Pin Name
I/O
Description
I/O
O
O
O
I
USB D+ signal.
PWM2 output (10V open-drain).
PWM1 output (5V open-drain).
PWM0 output (5V open-drain).
Reset input and +3.3V regulator output for USB tranceiver power
supply.
+5V power supply.
No Connection.
Ground.
12MHz oscillator output.
12MHz oscillator input.
2
Port B5 or I C interface data line.
2
Port B4 or I C interface clock line.
Port B3 or test pattern output
Port B2.
Port B1 or half frequency divider input.
Port B0 or half frequency divider output.
Interrupt request input, A low level on this can generate interrupt.
Port C7 or Sync on Green input.
Port C6.
Port C5.
Port C4.
Port C3 or ADC input 3.
Port C2 or ADC input 2.
Port C1 or ADC input 1.
Port C0 or ADC input 0.
Port A0 or DDC interface SDA pin.
Port A1 or DDC interface SCL pin.
Port A2 or PWM8 output.
Port A3 or PWM9 output.
Port A4 or PWM10 output.
Port A5 or PWM11 output.
Port A6 or PWM12 output.
Port A7 or PWM13 output or clamp pulse output.
1
2
3
4
5
1
2
3
4
5
1
2
3
4
8
D+
PWM2
PWM1
PWM0
/RESET/3V3
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
1
2
3
34
35
36
37
38
39
40
41
42
43
44
33
34
35
36
37
38
39
40
41
42
32
33
34
35
36
37
38
39
40
-
4
5
6
7
-
VDD
NC
GND
OSCO
OSCI
PB5/ SDA2
PB4/ SCL2
PB3/PAT
PB2
PB1/HFI
PB0/HFO
/IRQ
PC7/SOGIN
PC6
PC5
PC4
PC3/AD3
PC2/AD2
PC1/AD1
PC0/AD0
PA0/SDA1
PA1/SCL1
PA2/PWM8
PA3/PWM9
PA4/PWM10
PA5/PWM11
PA6/PWM12
PA7/PWM13/
CLAMP
PD0/VOUT
PD1/HOUT
PD2/PWM7
PD3/PWM6
NC
PD4/PWM5
PD5/PWM4
PWM3
HIN
VIN
D-
I/O
I
I/O
I/O
I/O
I/O
I/O
I/O
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
I
I/O
Port D0 or Vsync output.
Port D1 or Hsync output.
Port D2 or PWM7 output.
Port D3 or PWM6 output.
No Connection.
Port D4 or PWM5 output.
Port D5 or PWM4 output.
PWM3 output (10V open-drain).
Hsync Input.
Vsync input.
USB D- signal.
Weltrend Semiconductor, Inc.
Page 4
WT62P1
Data Sheet Rev. 1.01
FUNCTIONAL DESCRIPTION
CPU
8-bit 6502 compatible CPU operates at 6MHz. Address bus is 16-bit and data bus is 8-bit.
The non-maskable interrupt (/NMI) of 6502 is modified to be maskable and is defined as INT0 with higher
priority. The interrupt request (/IRQ) of 6502 is defined as INT1 with lower priority.
Please refer the 6502 reference menu for more detail.
RAM
512 bytes RAM. Address is located from $0080h to $00FFh and $0180h to $02FFh.
RAM from $0200h to $027Fh and $0280h to $02FFh can be disabled individually to emulate different
RAM size IC. (see Register $0FFFh)
ROM
32768 bytes flash memory for program. Address is located from $8000h to $FFFFh.
The following addresses are reserved for special purpose :
$FFFAh (low byte) and $FFFBh (high byte) : INT0 interrupt vector.
$FFFCh (low byte) and $FFFDh (high byte) : program reset interrupt vector.
$FFFEh (low byte) and $FFFFh (high byte) : INT1 interrupt vector.
$0000h
:
Registers
$003Fh
$0040h
Reserved
:
$007Fh
$0080h
:
128 bytes RAM
$00FFh
$0100h
Reserved
:
$017Fh
$0180h
:
384 bytes RAM
$02FFh
$0300h
Reserved
:
$0FFEh
$0FFFh Configuration Register
$1000h
Reserved
:
$7FFFh
$8000h
:
:
Flash ROM
:
$FFFFh
System Reset
There are four reset sources of this controller. Fig.1 shows the block diagram of reset logic.
Weltrend Semiconductor, Inc.
Page 5
WT62P1
Data Sheet Rev. 1.01
%&'
&(
%)
!"#$
Fig. 1 Reset Signals
External Reset
A low level on the RESET/3.3V pin will generate reset.
Illegal address Reset
When the address bus of CPU goes to illegal address, a reset pulse will be generated.
The illegal address is defined as $0040h~$007Fh, $0300h~$0FFEh and $1000h~$7FFFh.
Low VDD Voltage Reset
When VDD is below 3.9V, an internal reset signal is generated. The reset signal will last 2.048 ms after
the voltage is higher than 3.9V.
Watchdog Timer Reset
If a time-out happens when watchdog timer is enabled, a reset pulse is generated. Please refer
watchdog timer section for more information.
Weltrend Semiconductor, Inc.
Page 6
WT62P1
Data Sheet Rev. 1.01
I/O Port
I/O Port A
Pin PA0 and PA1 are shared with DDC interface SDA1 and SCL1 When ENDDC bit is “ 0” , These two
pins becomes I/O port. If PA0OE bit is set, Pin PA0 is an open-drain output. If PA0OE is cleared, Pin
PA0 is an input pin with no internal pull-up resistor. The operation of PA1 is same as PA0. Fig. 2 Shows
the structure of PA0.
INTERNAL_DATA_BUS
DATA[0]
D
Q
PA0OE
PA0
WRITE_PA_CTRL
C
QN
R
RESET
DATA[0]
D
WRITE_PA_DATA
PA0
Q
C
QN
R
RESET
READ_PA_DATA
DATA[0]
Fig.2 Structure of PA0 and PA1
Pin PA2 to PA6 are shared with PWM output. When corresponding EPWMx bit is “ 0” , the pin is I/O port.
If PAxOE bit is set, it is a push-pull type output. If PAxOE bit is cleared, it is an input pin with internal
pull-up resistor.
Pin PA7 is shared with PWM13 output and clamp pulse output. When both EPWM13 bit and ENCLP bit
are “ 0” , this pin becomes I/O port. If PA7OE bit is set, it is a push-pull type output. If PA7OE bit is
cleared, it is an input pin with internal pull-up resistor.
INTERNAL_DATA_BUS
DATA[2]
D
WRITE_PA_CTRL
Q
C
PA2OE
QN
R
PA2
RESET
DATA[2]
D
WRITE_PA_DATA
Q
C
PA2
QN
R
RESET
READ_PA_DATA
DATA[2]
Fig.3 Structure of PA2
Weltrend Semiconductor, Inc.
Page 7
WT62P1
Data Sheet Rev. 1.01
Port A Control Register
Name
Addr R/W Initial
PA_CTRL 0000h W
00h
Bit 7
PA7OE
Bit 6
PA6OE
Bit 5
Bit4
Bit 3
Bit 2
Bit 1
Bit 0
PA5OE
PA4OE
PA3OE
PA2OE
PA1OE
PA0OE
Bit Name
Description
PAnOE Port An Output Enable.
When it is set, PAn is output pin.
When it is cleared, PAn is input pin with internal pull high (except PA0 and PA1 pins).
Port A Data Register
Name
Addr R/W Initial
PA_DATA 0001h R
00h
W
00h
Bit 7
PA7
PA7
Bit 6
PA6
PA6
Bit 5
PA5
PA5
Bit4
PA4
PA4
Bit 3
PA3
PA3
Bit 2
PA2
PA2
Bit 1
PA1
PA1
Bit 0
PA0
PA0
Bit Name
Description
PAn (W) This bit controls the output level when the corresponding PAnOE bit is set.
When PAn=1, PAn pin outputs high level. (PA0 and PA1 are open-drain output)
When PAn=0, PAn pin outputs low level.
PAn (R) When PAnOE=1 (i.e. output port), this bit is same as PAn (W).
When PAnOE=0, this bit indicates the input level. “ 1” means high and “ 0” means low.
I/O Port B
I/O Port B is shared with some special functions. When the special function is disabled, it is an general
I/O port and is same as Port A2. If it is configured as an output, it can source/sink 6mA. If it is configured
as an input, it has an internal pull-up resistor.
Port B Control Register
Name
Addr R/W Initial
PB_CTRL 0002h W
00h
Bit 7
--
Bit 6
--
Bit 5
PB5OE
Bit4
PB4OE
Bit 3
PB3OE
Bit 2
PB2OE
Bit 1
PB1OE
Bit 0
PB0OE
Bit 2
PB2
PB2
Bit 1
PB1
PB1
Bit 0
PB0
PB0
Bit Name
Description
PBnOE Port Bn Output Enable.
When it is set, PBn is output pin.
When it is cleared, PBn is input pin with internal pull high
Port B Data Register
Name
Addr R/W Initial
PB_DATA 0003h R
00h
W
00h
Bit 7
---
Bit 6
---
Bit 5
PB5
PB5
Bit4
PB4
PB4
Bit 3
PB3
PB3
Bit Name
Description
PBn (W) This bit controls the output level when the corresponding PBnOE bit is set.
When PBn=1, PBn pin outputs high level.
When PBn=0, PBn pin outputs low level.
PBn (R) When PBnOE=1 (i.e. output port), this bit is same as PBn (W).
When PBnOE=0, this bit indicates the input level. “ 1” means high and “ 0” means low.
Weltrend Semiconductor, Inc.
Page 8
WT62P1
Data Sheet Rev. 1.01
I/O Port C
The structure of I/O Port C is same as Port B except the output low level has 10mA current sink
capability.
Port C Control Register
Name
Addr R/W Initial Bit 7
PC_CTRL 0004h W
00h PC7OE
Bit 6
PC6OE
Bit 5
PC5OE
Bit4
PC4OE
Bit 3
PC3OE
Bit 2
PC2OE
Bit 1
PC1OE
Bit 0
PC0OE
Bit 2
PC2
PC2
Bit 1
PC1
PC1
Bit 0
PC0
PC0
Bit Name
Description
PCnOE Port Cn Output Enable.
When it is set, PCn is output pin.
When it is cleared, PCn is input pin with internal pull high
Port C Data Register
Name
Addr R/W Initial
PC_DATA 0005h R
00h
W
00h
Bit 7
PC7
PC7
Bit 6
PC6
PC6
Bit 5
PC5
PC5
Bit4
PC4
PC4
Bit 3
PC3
PC3
Bit Name
Description
PCn (W) This bit controls the output level when the corresponding PCnOE bit is set.
When PCn=1, PCn pin outputs high level.
When PCn=0, PCn pin outputs low level.
PCn (R) When PCnOE=1 (i.e. output port), this bit is same as PCn (W).
When PCnOE=0, this bit indicates the input level. “ 1” means high and “ 0” means low.
I/O Port D
I/O Port D is shared with some special functions. When the special function is disabled, it is an general
I/O port and is same as Port A2. If it is configured as an output, it can source/sink 6mA. If it is configured
as an input, it has an internal pull-up resistor.
Port D Control Register
Name
Addr R/W Initial
PD_CTRL 0006h W
00h
Bit 7
--
Bit 6
--
Bit 5
PD5OE
Bit4
PD4OE
Bit 3
PD3OE
Bit 2
PD2OE
Bit 1
PD1OE
Bit 0
PD0OE
Bit 2
PD2
PD2
Bit 1
PD1
PD1
Bit 0
PD0
PD0
Bit Name
Description
PDnOE Port Dn Output Enable.
When it is set, PDn is output pin.
When it is cleared, PDn is input pin with internal pull high
Port D Data Register
Name
Addr R/W Initial
PD_DATA 0007h R
x0h
W
x0h
Bit 7
---
Bit 6
---
Bit 5
PD5
PD5
Bit4
PD4
PD4
Bit 3
PD3
PD3
Bit Name
Description
PDn (W) This bit controls the output level when the corresponding PDnOE bit is set.
When PDn=1, PDn pin outputs high level.
When PDn=0, PDn pin outputs low level.
PDn (R) When PDnOE=1 (i.e. output port), this bit is same as PDn (W).
When PDnOE=0, this bit indicates the input level. “ 1” means high and “ 0” means low.
Weltrend Semiconductor, Inc.
Page 9
WT62P1
Data Sheet Rev. 1.01
SYNC Processor
The functional block diagram of Sync Processor is shown in Fig.4. It contains H and V polarity detection
circuit, H and V frequency counter, composite sync signal separation circuit, free-running H and V sync
signal generator, vedio signal generation circuit for burn-in test and clamp pulse generator.
H Period Counter
SEPART
SOG
EXTRHS
HIN
H Polarity
Detect
MUX
SOGIN
Composite Signal
Separator
MUX
H Freq Counter
BYPASS
EXTRVS
ENFREE
HOPOL
MUX
HINPOL
MUX
H Polarity Control
ENFREE
Clamp Pulse
Generator
HOUT
FREEHS
FREE2
FREE1
Free-running Sync
Signal Generator
VOPOL
FREEVS
FREE0
CLAMP
MUX
V Polarity Control
VOUT
SEPART
VINPOL
MUX
V Polarity Detect
VIN
V Freq Counter
PAT1
PAT0
Fig.4
Test Pattern
Generator
PAT
Block diagram of sync signal processor
Horizontal Polarity Detect
The horizontal polarity is detected by sampling HIN signal at 5.5~6.5us after rising and falling edge of
HIN. If the result of sampling is low and lasts 192~256us with no change, the polarity is positive
(HINPOL=1). If the result of sampling is high and lasts 192~256us with no change, the polarity is
negative (HINPOL=0).
Vertical Polarity Detect
Vertical polarity is detected by sampling VIN level at 2.048ms after rising edge of VIN. If the level is low,
the polarity is positive (VINPOL=1). If the level is high, the polarity is negative (VINPOL=0). But if
SEPART bit is set, the VINPOL bit is “ 1” because the Vsync from composite signal separator is always
positive polarity.
Output Polarity Control
The polarities of HOUT and VOUT are controlled by HOPOL and VOPOL bites. When the bit is set, the
output polarity is positive. When the bit is cleared, the output polarity is negative.
Weltrend Semiconductor, Inc.
Page 10
WT62P1
Data Sheet Rev. 1.01
Horizontal frequency counter
A 12-bit counter is used to measure horizontal frequency. User can choose 16ms or 32ms time interval
to count pulse number of Hsync every 16.384ms or 32.768ms. For example, if QUICK bit is set, when a
16.384ms time frame begins, it resets the counter and starts counting Hsync pulses till 16ms reached,
then loads the counter value to HFREQ_H and HFREQ_L registers. If the H frequency is over 125KHz,
the H counter will stop counting and set overflow flag (HOVF ) to “ 1” .
The sync processor interrupt is generated every 16.384ms or 32.768ms for checking H frequency. This
interrupt will be cleared after reading the HFREQ_H register.
Hsync
Interrupt
Hfreq Counter
Enable
16/32 ms
16.384/32.768
Hfreq Counter
Clock
Fig.5 Horizontal Frequency Counter timing
Horizontal Frequency Register
Name
Addr R/W Initial
HFREQ_L 0008h R
xxh
HFREQ_H 0009h R
xxh
Bit 7
HLVL
HOVF
Bit 6
HINPOL
HFH6
Bit 5
-HFH5
Bit4
HFL4
HFH4
Bit 3
HFL3
HFH3
Bit 2
HFL2
HFH2
Bit 1
HFL1
HFH1
Bit 0
HFL0
HFH0
Bit Name
HLVL
Description
“ 1” : Indicates Hsync pin is high level.
“ 0” : Indicates Hsync pin is low level.
HINPOL
“ 1” : Indicates Hsync input is positive polarity.
“ 0” : Indicates Hsync input is negative polarity.
HOVF
Indicates H counter is overflowed (over 125KHz) when this bit is set.
HFH6 …HFH0 Indicates the Hsync frequency in kHz.
HFL4 … HFL0 When QUICK=” 0” , HFL4 ~ HFL0 indicates the Hsync frequency in 31.25Hz unit.
When QUICK=” 1” , HFL4 ~ HFL1 indicates the Hsync frequency in 62.5Hz.
Example of Hsync Frequency Calculation
QUICK=”0”
HFH6..0 HFL4..0
Max. Freq
Min. Freq
$40h
$00000b 64.0313KHz 63.9687KHz
$40h
$00001b 64.0625KHz 64.0000KHz
$40h
$00010b 64.0938KHz 64.0312KHz
$40h
$00011b 64.1250KHz 64.0625KHz
$51h
$10000b 81.5313KHz 81.4687KHz
$51h
$10001b 81.5625KHz 81.5000KHz
$51h
$10010b 81.5938KHz 81.5312KHz
$51h
$10011b 81.6250KHz 81.5625KHz
HFH6..0
$40h
Weltrend Semiconductor, Inc.
Page 11
QUICK=”1”
HFL4..0
Max. Freq Min. Freq
$0000xb 64.0625KHz 63.9375KHz
$40h
$0001xb
64.1250KHz 64.0000KHz
$51h
$1000xb
81.5625KHz 81.4375KHz
$51h
$1001xb
81.6250KHz 81.5000KHz
WT62P1
Data Sheet Rev. 1.01
Vertical frequency counter
A 13-bit counter is used to measure the time interval between two vertical sync pulses. It will be updated
every vertical frame. The clock of this counter is 125kHz. So the frequency of Vsync is [125000 / (counter
value + 1)] Hz. When V frequency is lower than 15.25Hz, this counter stops counting and set VOVF bit to
“ 1” .
Vertical Frequency Register
Name
Addr R/W Initial
VFREQ_L 000Ah R
xxh
VFREQ_H 000Bh R
xxh
Bit 7
VF7
VLVL
Bit 6
VF6
VINPOL
Bit 5
VF5
VOVF
Bit4
VF4
VF12
Bit 3
VF3
VF11
Bit 2
VF2
VF10
Bit 1
VF1
VF9
Bit 0
VF0
VF8
Bit Name
Description
VLVL
“ 1” : Indicates Vsync pin is high level.
“ 0” : Indicates Vsync pin is low level.
VNPOL “ 1” : Indicates Vsync input is positive polarity.
“ 0” : Indicates Vsync input is negative polarity.
VOVF
Indicates V counter is overflowed when this is set. Vsync frequency is lower than 15.25Hz
VF12 ~ VF0 Indicates the Vertical Total Time. Vertical frequency is [125000 / (counter value +1) ] Hz
Example of Vsync Frequency Calculation
VF12..0 Max. Freq
Min. Freq
$05BDh
85.15Hz
85.034Hz
$05BEh
85.092Hz
84.976Hz
$05BFh
85.034Hz
84.918Hz
$0681h
75.12Hz
75.03Hz
$0682h
75.075Hz
74.985Hz
$0683h
75.03Hz
74.94Hz
$06C7h
72.088Hz
72.005Hz
$06C8h
72.046Hz
71.963Hz
$06C9h
72.005Hz
71.921Hz
VF12..0
$0783h
$0784h
$0785h
$0823h
$0824h
$0825h
$1FFEh
$1FFEh
$1FFFh
Max. Freq
65.036Hz
65.003Hz
64.969Hz
60.038Hz
60.01Hz
59.981Hz
15.266Hz
15.264Hz
15.262Hz
Min. Freq
64.969Hz
64.935Hz
64.901Hz
59.981Hz
59.952Hz
59.923Hz
15.262Hz
15.260Hz
15.258Hz
Hsync period counter
This is an 8-bit counter that uses 6MHz clock to measure time interval between two H pulses. If the H
frequency is lower than 23437.5Hz, this counter will overflow and register H_PERD value is zero.
Horizontal Period Register
Name Addr R/W Initial Bit 7
H_PERD 000Ch R
xxh HPRD7
Bit Name
HPRD7 .. 0
Bit 6
HPRD6
Bit 5
HPRD5
Bit4
HPRD4
Bit 3
HPRD3
Bit 2
HPRD2
Description
H freq = 6MHz / (counter value+1)
Example of Hsync Frequency Calculation
HPRD7..0 Max. Freq Min. Freq
HPRD7..0
$49h
83.333KHz 81.081KHz
$7Ch
$4Ah
82.192KHz
80KHz
$7Dh
$4Bh
81.081KHz 78.947KHz
$7Eh
$5Dh
65.217KHz 63.83KHz
$BFh
$5Eh
64.516KHz 63.158KHz
$C0h
$5Fh
63.83KHz
62.5KHz
$C1h
Weltrend Semiconductor, Inc.
Page 12
Max. Freq
48.78KHz
48.387KHz
48KHz
31.579KHz
31.414KHz
31.25KHz
Min. Freq
48KHz
47.619KHz
47.244KHz
31.25KHz
31.088KHz
30.928KHz
Bit 1
HPRD1
Bit 0
HPRD0
WT62P1
Data Sheet Rev. 1.01
Composite Sync Signal Separator
Composite sync signal separator extract Vsync signal from HIN or SOGIN input pin by filtering pulses
which is less than 6us. The output Vsync signal will be widened about 5.5~6.5us. The output Hsync will
be replaced by 2us pulse during Vsync pulse.
The composite sync signal separator can handle H+V and H exclusive OR V signals. Fig.5 shows the
timing relationship of the extracted H and V sync signals.
If Hsync output do not want to insert pseudo H pulses (EXTRHS signal) during Vsync pulse, set BYPASS
bit can let HOUT pin output waveform same as Hsync input (Note: polarity can be controlled by HOPOL
bit).
Hsync
Vsync
H+V
H XOR V
Bypass H pulse
Insert H pulse
Bypass H pulse
EXTRHS
2us
2us
EXTRVS
5.5~6.5us
Hsync
Vsync
H EORV
Bypass H pulse
Insert H pulse
Bypass H pulse
EXTRHS
2us
2us
EXTRVS
5.5~6.5us
Fig. 6
Timing relationship of composite sync signal separator
Weltrend Semiconductor, Inc.
Page 13
WT62P1
Data Sheet Rev. 1.01
Free-running sync signal and self-test pattern
The self-generated free run sync signals are output from HOUT and VOUT pins when ENFREE bit is set.
Four kinds of standard VESA timings are selected by FREE1 and FREE0 bits.
Self-test pattern signal is output from PAT pin when ENPAT bit is set. PAT1 and PAT0 bits select
different self-test pattern.
PAT1 = 0 , PAT0 = 0
PAT1 = 1 , PAT0 = 0
PAT1 = 0 , PAT0 = 1
PAT1 = 1 , PAT0 = 1
Fig.7 Test Pattern
FREE2,1,0 bit value
FH
FV
THT
TVT
THS
THB
THF
TVS
TVB
TVF
TVIDEO
X00
Hor frequency
31.496KHz
Ver frequency
59.993Hz
Hor total time
31.75us
Ver total time
16.669ms
H sync time
3.833us
H Back porch +
2 us
H Left border
H Front porch +
0.708us
H Right border
V sync time
2 x THT
V Back porch +
33 X THT
V Top border
V Front porch +
11 x THT
V Bottom border
Video pulse width 41.67ns
X01
010
011
110
111
48KHz
72.072Hz
20.833us
13.875ms
2.417us
1.417us
63.83KHz
59.878Hz
15.667us
16.7ms
1us
2.417us
81.25KHz
64.865Hz
12.333us
15.417ms
1.083us
1.833us
1.125us
0.542us
0.375us
0.375us
0.292us
6 x THT
23 x THT
3 x THT
38 x THT
3 x THT
46 x THT
3 x THT
44 x THT
3 x THT
46 x THT
38 x THT
3 x THT
2 x THT
2 x THT
2 x THT
41.67ns
41.67ns
41.67ns
41.67ns
41.67ns
90.909KHz 106.195KHz
84.8Hz
84.96Hz
11us
9.417us
11.792ms 11.771ms
1us
0.833us
1.583us
1.417us
THS
THT
HOUT
VOUT
TVS
TVT
THT
THS
HOUT
PAT
THB
THB
THF
TVEDIO
Fig.8 Free-running sync signal and test pattern timing
Weltrend Semiconductor, Inc.
Page 14
WT62P1
Data Sheet Rev. 1.01
Clamp pulse
Clamp pulse is generated on either rising or falling edge of HOUT pin by setting the CLPEG bit. The
pulse width of clamp is specified by CLPPW bit. Output polarity is specified by CLPPO bit.
HOUT
0.542~0.625us/2.042~2.125us
CLAMP
CLPPO=1
CLAMP
CLPPO=0
0.542~0.625us/2.042~2.125us
Fig. 9a Clamp pulse waveform (CLPEG=1)
HOUT
0.542~0.625us/2.042~2.125us
CLAMP
CLPPO=1
CLAMP
CLPPO=0
0.542~0.625us/2.042~2.125us
Fig. 9b Clamp pulse waveform (CLPEG=0)
Sync Processor Control Registers
Name
Addr R/W
HV_CR1 0008h W
HV_CR2 0009h W
HV_CR3 000Ah W
Bit Name
ENHOUT
ENVOUT
HOPOL
VOPOL
QUICK
SEPART
ENFREE
ENPAT
ENCLP
CLPEG
Initial Bit 7
Bit 6
Bit 5
00h ENHOUT ENVOUT HOPOL
00h ENCLP CLPEG CLPPO
x0h
----
Bit4
VOPOL
CLPPW
--
Bit 3
Bit 2
Bit 1
Bit 0
QUICK SEPART ENFREE ENPAT
FREE1
FREE0
PAT1
PAT0
-SOG
FREE2 BYPASS
Description
“ 1” : Enable HOUT.
“ 0” : Disable HOUT. Pin is configured as I/O port PD1.
“ 1” : Enable VOUT.
“ 0” : Disable VOUT. Pin is configured as I/O port PD0.
“ 1” : HOUT is positive polarity.
“ 0” : HOUT is negative polarity.
“ 1” : VOUT is positive polarity.
“ 0” : VOUT is negative polarity.
“ 1” : Select 16ms time interval to count H pulses every 16.384ms.
“ 0” : Select 32ms time interval to count H pulses every 32.768ms.
“ 1” : Enable sync separator circuit and use the extracted Vsync signal as VOUT.
“ 0” : VOUT pin outputs Vsync from VIN pin
Enable free-running sync signal output on HOUT and VOUT pins when this bit is set.
“ 1” : Enable self-test pattern output on PAT pin when this bit is set.
“ 0” : Disable test pattern output. Pin is configured as I/O port PB3.
“ 1” : Enable clamp pulse output on CLAMP pin.
“ 0” : Disable clamp pulse output. Pin is configured as I/O port PA7.
“ 1” : Clamp pulse follows HOUT signal’s rising edge.
“ 0” : Clamp pulse follows HOUT signal’s falling edge.
Weltrend Semiconductor, Inc.
Page 15
WT62P1
Data Sheet Rev. 1.01
CLPPO
CLPPW
FREE2,1,0
PAT1,0
SOG
BYPASS
Select polarity of clamp pulse.
“ 1” : Positive polarity
“ 0” : Negative polarity
Select pulse width of clamp pulse.
“ 1” : 2us
“ 0” : 0.5us
Select free-running sync signal frequency.
“ 111” : 1600x1200@85Hz
H = 106.25kHz , V = 85Hz
“ 110” : 1280x1024@85Hz
H = 91kHz , V = 85Hz
“ 011” : 1600x1200@65Hz
H = 81kHz , V = 65Hz
“ 010” : 1280x1024@60Hz
H = 64kHz , V = 60Hz
“ x01” : 800x600@72Hz
H = 48kHz, V = 72Hz
“ x00” : 640x480@60Hz
H = 31.4kHz, V = 60Hz
Select test pattern.
“ 00” : White picture
“ 01” : 2x2 cross hatch
“ 10” : Black picture
“ 11” : Inverse 2x2 cross hatch
Select composite sync signal input source.
“ 1” : Composite sync signal comes from SOGIN pin.
“ 0” : Composite sync signal comes from HIN pin.
Select bypass the composite signal separator or not.
“ 1” : HOUT pin outputs sync signal bypass the composite signal separator.
“ 0” : HOUT pin outputs sync signal from the composite signal separator.
Weltrend Semiconductor, Inc.
Page 16
WT62P1
Data Sheet Rev. 1.01
Half Frequency Function
When ENHLFIO bit is set, Pin PB1 becomes half frequency input (HLFI) and Pin PB0 becomes half
frequency output (HLFO). The HALF bit controls the divided-by-two function is enabled or not.
HLF_POL
HLFO
HALF
HLFI
D
Q
C
QN
Fig. 10 Half Hsync frequency
Half Frequency Output Control Register
Name
Addr R/W Initial
HLF_CON 000Dh W
x0h
Bit Name
ENHFIO
HALF
HF_POL
Bit 7
--
Bit 6
--
Bit 5
--
Bit4
--
Bit 3
--
Bit 2
ENHFIO
Bit Description
Enable half frequency input and output pins.
“ 1” : PB1 and PB0 pins are half frequency input and output pins.
“ 0” : PB1 and PB0 pins are I/O port.
“ 1” : HLFO pin outputs half frequency from HLFI pin.
“ 0” : HLFO pin outputs same frequency from HLFI pin.
“ 1” : HLFO polarity is not same as HLFI.
“ 0” : HLFO polarity is same as HLFI.
Weltrend Semiconductor, Inc.
Page 17
Bit 1
HALF
Bit 0
HF_POL
WT62P1
Data Sheet Rev. 1.01
DDC Interface
2
The DDC interface is a slave mode I C interface with DDC1 function. It is compatible with VESA
DDC1/2B standard. This interface not only can be used for DDC communication, but also can be applied
for factory alignment purpose.
When ENDDC bit is set, the outputs of SDA1 and SCL1 pins are open-drain type. The DDC function
depends on the DDC2 bit value. If DDC2 bit is “ 0” , it is in DDC1 state. If DDC2 bit is “ 1” , it is in DDC2
state
In DDC1 state, the data is shifted out to SDA1 pin on the rising edge of VSYNC clock. Data format is an
8-bit byte followed by a null bit (always “ 1” ). Most significant bit (MSB) is transmitted first. Every time
when the ninth bit has been transmitted, the shift register will load a data byte from data buffer (DDC_TX
register). After loading data to the shift register, the data buffer becomes empty and generates an
interrupt. Program can check DDCRDY bit to load new data byte.
If a high to low transition occurs on SCL1 in DDC1 state, the SCLH2L bit will be set and generate an
interrupt. Program can set DDC2 bit to enter DDC2 state. If no valid DDC2 command is received within a
certain time (for example, 128 Vsync clocks or 2sec), program should clear DDC2 bit and back to DDC1
state to avoid noise interference.
The data format of DDC2 is
S
Address
R/W A
D7,D6,...., D0
A
D7,D6,...., D0
A
P
S : Start condition. A falling edge on SDA1 pin when SCL1 pin is high level.
P : Stop condition. A rising edge on SDA1 pin when SCL1 pin is high level.
A : Acknowledge bit. 0 means acknowledge and 1 means non-acknowledge.
Address : 7-bit device address.
R/W : Read/Write control bit, "1" is read and "0" is write.
D7,D6,...., D0 : data byte.
In DDC2 state, after START and valid address is received, it send out ACK(“ 0” ) if the TXNAK1 bit is “ 0” .
Otherwise the SDA1 pin outputs NACK(” 1” ). An interrupt will be generated after sending ACK bit and
SCL1 pin is pulled low to stop the clock for handshaking. In the interrupt routine, write DDC_AR0 register
will stop pulling low the SCL1 pin and clear the interrupt. The received address byte can be read in
DDC_RX register and also can use MATCH bit to identify what address is received. The Write or Read
operation can be checked by reading the DDCRW bit.
Write operation
After received the first byte (address byte), interrupt routine finds it is the first byte (FIRST=1) and write
operation (DDCRW=0), program should clear TX bit to “ 0” (for receiving data) and write DDC_AR0
register (to release the SCL1 pin). Then the host sends out a data byte and SDA1 pin outputs ACK if
TXNACK bit is “ 0” . An interrupt is generated after the ACK bit to inform CPU to read DDC_RX register.
When host finished transferring data, it will send STOP condition. When STOP condition is detected, the
STOP bit will be set and generates an interrupt. The interrupt routine can use the STOP bit to know the
data transfer is finished and start executing the received command.
Read operation
After received the first byte (address byte), interrupt routine finds it is the first byte (FIRST=1) and read
operation (DDCRW=1), program should set TX bit to “ 1” , write data to DDC_TX register and write
DDC_AR0 register (to release the SCL1 pin). The host will output ACK after received a data byte. When
host wants to finish reading, it outputs NACK to stop communication. Program can read the RXACK1 bit
to check the acknowledge bit that host sends.
Weltrend Semiconductor, Inc.
Page 18
WT62P1
Data Sheet Rev. 1.01
DDC1 Timing
N
N
N
N
Pull low
SCL
START
START
N
Pull low
SCL
Weltrend Semiconductor, Inc.
Page 19
WT62P1
Data Sheet Rev. 1.01
DDC2 Timing
START
Pull low
SCL
Pull low
SCL
A
Pull low
SCL
A
STO
P
A
Pull low
SCL
Pull low
SCL
Pull low
SCL
START
A
STO
P
Pull low
SCL
Pull low
SCL
Pull low
SCL
START
A
A
STO
P
Weltrend Semiconductor, Inc.
Page 20
WT62P1
Data Sheet Rev. 1.01
DDC Receive Buffer Register
Name Addr R/W Initial
DDC_RX 0014h R
FFh
Bit 7
DRX7
Bit 6
DRX6
Bit 5
DRX5
Bit4
DRX4
Bit 3
DRX3
Bit 2
DRX2
Bit 1
DRX1
Bit 0
DRX0
Bit 3
DTX3
Bit 2
DTX2
Bit 1
DTX1
Bit 0
DTX0
Bit Name
Description
DRX7 … DRX0 DDC received data is stored in this register.
DDC Transmit Buffer Register
Name Addr R/W Initial
DDC_TX 0014h W FFh
Bit 7
DTX7
Bit 6
DTX6
Bit 5
DTX5
Bit4
DTX4
Bit Name
Description
DTX7 … DTX0 This register stores the data to be transmitted
DDC Status Register
Name
Addr R/W Initial Bit 7
Bit 6
DDC_STA 0015h R 01h DDCRDY SCLH2L
Bit Name
DDCRDY
SCLH2L
DDC2(R)
FIRST
STOP
DDC2RW
MATCH
RXNAK1
Bit 5
DDC2
Bit4
FIRST
Bit 3
STOP
Bit 2
Bit 1
Bit 0
DDC2RW MATCH RXNAK1
Description
When it is set, data buffer is ready to read/write or a SCL1 high to low transition in DDC1
state.
Indicates a high to low transition on SCL1 pin in DDC1 state when it is set.
“ 1” : Indicates it is in DDC2 state.
“ 0” : Indicates it is in DDC1 state.
Indicates the first byte (address) is received when this bit is set.
Indicates STOP condition is received when this bit is set.
Indicates the received R/W bit after 7-bit address.
“ 1” : Read
“ 0” : Write
“ 1” : Address is equal to Address Register 1.
“ 0” : The most significant 4 bits are equal to Address Register 0.
Indicates the received acknowledge bit.
“ 1” : NACK
“ 0” : ACK
DDC Control Register
Name
Addr R/W Initial Bit 7
Bit 6
DDC_CON 0015h W 00h ENDDC CLRH2L
Bit Name
ENDDC
CLRH2L
DDC2(W)
TX
TXNAK1
Bit 5
DDC2
Bit4
--
Bit 3
--
Bit 2
TX
Bit 1
--
Description
“ 1” : Enable DDC interface. PA0 and PA1 are configured as DDC interface.
“ 0” : Disable DDC interface. PA0 and PA1 are configured as I/O port.
Set this bit will reset SCLH2L bit.
“ 1” : Set DDC2.
“ 0” : Set DDC1.
“ 1” : Set transmit direction.
“ 0” : Set receive direction.
Determines the ACK bit to be transmitted.
“ 1” : Transmit NACK.
“ 0” : Transmit ACK.
Weltrend Semiconductor, Inc.
Page 21
Bit 0
TXNAK1
WT62P1
Data Sheet Rev. 1.01
DDC Address Register 0
Name
Addr R/W Initial Bit 7
DDC_AR0 0016h W x0h DAR07
Bit Name
DAR07~
DAR04
ENAR0
Bit 6
DAR06
Bit 5
DAR05
Bit4
DAR04
Bit 3
--
Bit 2
--
Bit 1
--
Bit 0
ENAR0
Description
4-bit DDC address to be compared. DAR07 is compared with the MSB of the received
address.
Enable DAR07- DAR04 to be compared when this bit is set.
DDC Address Register 1
Name
Addr R/W Initial Bit 7
DDC_AR1 0017h W x0h DAR17
Bit Name
DAR17~
DAR11
ENAR1
Bit 6
DAR16
Bit 5
DAR15
Bit4
DAR14
Bit 3
DAR13
Bit 2
DAR12
Bit 1
DAR11
Bit 0
ENAR1
Description
7-bit DDC address to be compared. DAR17 is compared with the MSB of the received
address.
Enable DAR17- DAR11 to be compared when this bit is set.
Weltrend Semiconductor, Inc.
Page 22
WT62P1
Data Sheet Rev. 1.01
DDC Flow Chart
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Weltrend Semiconductor, Inc.
Page 23
/.
WT62P1
Data Sheet Rev. 1.01
Master/Slave I2C interface
2
2
The master/slave I C interface is provided for communicating with other I C devices in the monitor such
as EEPROM, OSD, deflection IC and so on.
Master Mode
To choose master mode, clear the SLAVE bit. The clock frequency can be programmed to 50KHz,
100kHz, 200kHz or 400KHz by setting MCLK1 and MCLK2 bits.
Send out START and the first byte (START, 7-bit address and R/W bit)
First, clear I2CRW bit to select transmitter mode and write first byte (7-bit address and R/W bit) to
MI2C_TX register. Then set MSTR bit, master will generate a START condition and send out the first
byte with the clock speed specified in MCLK1 and MCLK2 bits. After the whole data byte is transmitted
and the 9th bit is received, the MI2CRDY bit is set and generates an interrupt if it is enabled. The 9th bit
will be stored in RXNAK2 bit for checking the slave acknowledge or not. The SCL2 pin will keep low to
wait next byte operation.
Send out the following bytes
If it is a write command, write a data byte to MI2C_TX register, then write any value to I2C_AR register to
clear MI2CRDY bit. It will send out the data byte and store the acknowledge bit from slave in RXACK2 bit.
Again, the MI2CRDY bit is set after the acknowledge bit is received.
If it is a read command, set I2CRW bit to be receiver mode and write TXACK2 bit to determine what will
be sent on acknowledge bit, then write MI2C_AR register to clear I2CRDY bit and it will send out the
clock for receiving next byte. After the acknowledge bit is transmitted, the I2CRDY bit will be set. If
master wants to stop the read operation, send NACK on acknowledge bit to inform slave device.
Send out STOP
Set MSTOP bit will generate STOP condition.
Slave Mode
The slave mode operation is same as DDC interface in DDC2 state. First, set the SLAVE bit and set the
I2CRW bit to be receiver mode. When CPU is ready to receive, clear TXNAK2 bit. It will response ACK
when a START condition followed by an address (which is equal to I2C_ADR register) are received. An
interrupt can be generated if it is enabled and the R/W bit is stored in SRW bit for checking read/write
operation. After the ACK bit, SCL2 pin outputs low level to stop the clock for handshaking.
If a write command is received (SRW bit=0), read the I2C_RX register, clear I2CRW bit to receive next
byte, then write I2C_ADR to clear I2CRDY bit and stop pulling low the SCL2 pin for receiving next byte
from master. The output acknowledge bit is controlled by TX NAK2 bit.
If a read command is received (SRW bit=1), write data to I2C_TX register, clear I2CRW bit and write
I2C_ADR register to clear I2CRDY bit and stop pulling low the SCL2 pin for master sending out clock
The received acknowledge bit is stored in RXNAK2 bit.
Weltrend Semiconductor, Inc.
Page 24
WT62P1
Data Sheet Rev. 1.01
Master I2C Data Sequence
Weltrend Semiconductor, Inc.
Page 25
WT62P1
Data Sheet Rev. 1.01
Slave I2C Data Sequence
Weltrend Semiconductor, Inc.
Page 26
WT62P1
Data Sheet Rev. 1.01
2
I C interface Status Register
Name
Addr R/W Initial
I2C_STA 0010h R 22h
Bit Name
BB
SFIRST
SSTOP
SRW
RXNAK2
I2CRDY
Bit 7
--
Bit 6
--
Bit 5
BB
Bit4
SFIRST
Bit 3
SSTOP
Bit 2
SRW
Bit 1
Bit 0
RXNAK2 I2CRDY
Description
“ 1” : Bus busy.
“ 0” : Bus idle. Both SDA2 and SCL2 pins keep in high level for 5us after STOP condition.
This bit is set when received START and first byte in slave mode.
This bit is set when received STOP condition in slave mode.
Received R/W bit in slave mode.
“ 1” : Read command is received.
“ 0” : Write command is received.
“ 1” : NACK is received.
“ 0” : ACK is received.
This bit is set when a byte is received, transmitted or STOP condition is detected.
2
I C interface Control Register
Name
Addr R/W Initial
I2C_CON 0010h W 02h
Bit Name
ENI2C
MCLK1,0
MSTR
MSTOP
I2CRW
TXNAK2
SLAVE
Bit 7
ENI2C
Bit 6
MCLK1
Bit 5
MCLK0
Bit4
MSTR
Bit 3
MSTOP
Bit 2
I2CRW
Bit 1
TXNAK2
Bit 0
SLAVE
Description
“ 1” : Enable I2C interface.
“ 0” : Pin PB5 and pin PB4 are I/O port.
Select SCL clock in master mode
“ 00” : 400KHz
“ 01” : 100KHz
“ 11” : 200KHz
“ 10” : 50KHz
Output START condition in master mode when this bit is set.
Output STOP condition in master mode when this bit is set.
“ 0” : Transmitter , “ 1” : Receiver in master mode.
“ 1” : Transmitter , “ 0” : Receiver in slave mode
(“ 0” : I2C write mode, “ 1” : I2C read mode. )
“ 1” : Output NACK.
“ 0” : Output ACK. It will pull low the SDA2 pin on acknowledge bit.
“ 1” : Slave mode.
“ 0” : Master mode.
2
I C interface Transmit/Receive Buffer Register
Name Addr R/W Initial
I2C_TX 0011h W
xxh
I2C_RX 0011h R
xxh
Bit 7
MTX7
MRX7
Bit 6
MTX6
MRX6
Bit 5
MTX5
MRX5
Bit4
MTX4
MRX4
Bit 3
MTX3
MRX3
Bit 2
MTX2
MRX2
Bit 1
MTX1
MRX1
Bit 0
MTX0
MRX0
Bit 6
SAR6
Bit 5
SAR5
Bit4
SAR4
Bit 3
SAR3
Bit 2
SAR2
Bit 1
SAR1
Bit 0
--
2
I C interface Address Register
Name Addr R/W Initial
I2C_ADR 0012h W
xxh
Bit 7
SAR7
Bit Name
Description
SAR7 ~ SAR1 7-bit address to be compared in slave mode.
Weltrend Semiconductor, Inc.
Page 27
WT62P1
Data Sheet Rev. 1.01
Master I2C Flow Chart
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Weltrend Semiconductor, Inc.
Page 28
WT62P1
Data Sheet Rev. 1.01
Master I2C (restart mode) Flow Chart
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Weltrend Semiconductor, Inc.
Page 29
WT62P1
Data Sheet Rev. 1.01
Slave I2C Flow Chart
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Weltrend Semiconductor, Inc.
Page 30
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WT62P1
Data Sheet Rev. 1.01
Timer
It is a 6-bit down counter with 2-bit prescaler. The time base is selected by PS1 and PS0 bits. Timer
starts counting when writing data to TIMER register. When the counter reaches zero, the counter stops
and sets interrupt flag (IF_TMR). If program wants to start the timer again, write data to TIMER register.
PS1 PS0
TIM0 TIM1 TIM2 TIM3 TIM4 TIM5
Time base
Selector
6-Bit Timer
0.256ms
0.512ms
1.024ms
IF_TMR
4.096ms
IE_TMR
Fig.11 Block diagram of Timer
Timer Register
Name Addr R/W Initial
TIMER 0018h W
00h
Bit 7
PS1
Bit 6
PS0
Bit 5
TIM5
Bit Name
PS1,PS0
Bit4
TIM4
Bit Description
Prescaler of timer.
“ 00” : time base = 0.256ms
“ 01” : time base = 0.512ms
“ 10” : time base = 1.024ms
“ 11” : time base = 4.096ms
TIM5 ~ TIM0 Timer period = time base x (6-bit data)
Weltrend Semiconductor, Inc.
Page 31
Bit 3
TIM3
Bit 2
TIM2
Bit 1
TIM1
Bit 0
TIM0
WT62P1
Data Sheet Rev. 1.01
A/D converter
The Analog-to-Digital Converter (ADC) has 6-bit resolution with four selectable input channels. When an
input channel is selected, it will reset the ADC_DA register and start converting. After the conversion is
done, the ADRDY bit is set and valid data is stored in AD5~AD0 bits. The total conversion time is from
4.096ms to 8.192ms. If program want to make a new conversion, write ADC_CH register again and it will
start another conversion.
ADC Data Register
Name Addr R/W Initial Bit 7
ADC_DA 001Ah R
0xh ADRDY
Bit Name
ADRDY
AD5 ~ AD0
Bit 6
--
Bit 5
AD5
Bit4
AD4
Bit 3
AD3
Bit 2
AD2
Bit 1
AD1
Bit 0
AD0
Bit 3
CH3
Bit 2
CH2
Bit 1
CH1
Bit 0
CH0
Bit Description
ADC data is ready to read when this bit is set.
ADC data.
ADC Channel Select Register
Name Addr R/W Initial
ADC_CH 001Ah W
00h
Bit Name
CH3
CH2
CH1
CH0
Bit 7
--
Bit 6
--
Bit 5
--
Bit4
--
Bit Description
Select AD3 pin connect to ADC when this bit is set.
Select AD2 pin connect to ADC when this bit is set.
Select AD1 pin connect to ADC when this bit is set.
Select AD0 pin connect to ADC when this bit is set.
CH3
AD3
CH2
AD2
Comparator
CH1
AD1
CH0
AD0
Resistor Array
6-bit Counter
Fig.12 Block diagram of ADC
Weltrend Semiconductor, Inc.
Page 32
ADRDY
WT62P1
Data Sheet Rev. 1.01
A/D Converter Flow Chart
Weltrend Semiconductor, Inc.
Page 33
WT62P1
Data Sheet Rev. 1.01
Interrupt Control
There are two interrupt vectors of CPU. The high priority interrupt INT0 (vector in $FFFAh and $FFFBh)
is used for DDC interface interrupt. The low priority INT1 (vector in $FFFEh and $FFFFh) is ORed by six
interrupt sources. Each interrupt can be enabled/disabled independently by programming INT_EN
register and identified by INT_FLAG register.
DDC interface interrupt
Interrupt Condition
Clear Interrupt
Transmit data buffer is empty in DDC1 mode.
Write data to DDC_RX register.
A high to low transition on SCL1 pin in DDC1 Set CLRH2L bit in DDC_CON register and clear it .
mode.
Receive one byte in DDC2 mode.
Write address to DDC_AR0 register.
Transmit data buffer is empty in DDC2 mode.
Write address to DDC_AR0 register.
Received a STOP condition in DDC2 mode.
Write address to DDC_AR0 register.
2
I C interface interrupt
Interrupt Condition
After transmit a byte.
After receive a byte.
Received a STOP condition.
Clear Interrupt
Write address to MI2C_AR register.
Write address to MI2C_AR register.
Write address to MI2C_AR register.
USB interrupt
Interrupt Condition
Endpoint 0 IN token fail.
Endpoint 0 IN token success.
Reset transaction happened.
Endpoint 1 IN token fail.
Endpoint 1 IN token success.
OUT token is finished.
SETUP token is received.
Clear Interrupt
Set CLR_INT in USB_FPC register and clear.
Set CLR_INT in USB_FPC register and clear.
Set CLR_INT in USB_FPC register and clear.
Set CLR_INT in USB_FPC register and clear.
Set CLR_INT in USB_FPC register and clear.
Set CLR_INT in USB_FPC register and clear.
Set CLR_INT in USB_FPC register and clear.
Sync Processor interrupt
Interrupt Condition
Clear Interrupt
Latch a new H frequency to HFREQ_H and Read HFREQ_H Register.
HFREQ_L register every 32.768ms or 16.384ms.
Timer interrupt
Interrupt Condition
Timer expired.
Clear Interrupt
Write a value to TIMER register
IRQ pin interrupt
Interrupt Condition
Low level or falling edge on /IRQ pin.
Clear Interrupt
Set CLRIRQ bit in IRQ_CON register and clear it .
Vsync interrupt
Interrupt Condition
Leading edge of VOUT pin signal.
Clear Interrupt
Set CLRVSO bit in IRQ_CON register and clear it .
Weltrend Semiconductor, Inc.
Page 34
WT62P1
Data Sheet Rev. 1.01
Interrupt Flag Register
Name
Addr R/W Initial
Bit 7
Bit 6
Bit 5
Bit4
Bit 3
INT_FLAG 001Bh R
00h IF_DDC IF_MI2C IF_USB IF_SYNC IF_TMR
Bit Name
IF_DDC
IF_MI2C
IF_USB
IF_SYNC
IF_TMR
IF_IRQ
IF_VSO
Bit 2
IF_IRQ
Bit 1
IF_VSO
Bit 0
--
Bit 2
IE_IRQ
Bit 1
IE_VSO
Bit 0
--
Bit 2
IRQ
Bit 1
VSO
Bit 0
--
Bit Description
Indicate DDC interrupt when this bit is set.
Indicate I2C interrupt when this bit is set.
Indicate USB interrupt when this bit is set.
Indicate sync processor interrupt when this bit is set.
Indicate Timer interrupt when this bit is set.
Indicate IRQ interrupt when this bit is set.
Indicate VOUT interrupt when this bit is set.
Interrupt Enable Register
Name
INT_EN
Addr R/W Initial
Bit 7
Bit 6
Bit 5
Bit4
Bit 3
001Bh W
00h IE_DDC IE_MI2C IE_USB IE_SYNC IE_TMR
Bit Name
IE_DDC
IE_MI2C
IE_USB
IE_SYNC
IE_TMR
IE_IRQ
IE_VSO
Bit Description
Enable DDC interrupt when this bit is set.
Enable I2C interrupt when this bit is set.
Enable USB interrupt when this bit is set.
Enable sync processor interrupt when this bit is set.
Enable Timer interrupt when this bit is set.
Enable IRQ interrupt when this bit is set.
Enable VOUT interrupt when this bit is set.
Interrupt Source Register
Name
INT_SRC
Addr R/W Initial
001Ch R
Bit Name
SYNC
TIMER
IRQ
VSO
Bit 7
--
Bit 6
--
Bit 5
--
Bit4
SYNC
Bit 3
TIMER
Bit Description
Indicate H frequency counter is ready to read when this bit is set..
Indicate Timer expired when this bit is set.
Indicate a low level or falling edge occurs on IRQ pin when this bit is set.
Indicate a leading edge occurs on VOUT pin when this bit is set.
IRQ Control Register
Name
Addr R/W Initial
IRQ_CON 001Ch W
00h
Bit Name
CLRVSO
CLRIRQ
IRQ_EG
Bit 7
--
Bit 6
--
Bit 5
--
Bit4
--
Bit 3
--
Bit 2
Bit 1
Bit 0
CLRIRQ CLRVSO IRQ_EG
Bit Description
Clear VOUT interrupt when this bit is set.
Clear IRQ interrupt when this bit is set.
Select IRQ pin interrupt type.
“ 1” : Falling edge
“ 0” : Low level
Watchdog Timer
Watchdog timer will generate a reset pulse if CPU does not write WDT register within 259.072ms or
518.144ms. This function can be disable by setting DISWDT bit.
Weltrend Semiconductor, Inc.
Page 35
WT62P1
Data Sheet Rev. 1.01
Watchdog Timer Register
Name Addr R/W Initial
WDT
001Dh W
00h
Bit Name
DISWDT
WDT
Bit 7
--
Bit 6
--
Bit 5
--
Bit4
--
Bit 3
--
Bit 2
--
Bit 1
DISWDT
Bit 0
WDT
Bit 2
STEST
Bit 1
BANK3
Bit 0
BANK2
Description
“ 1”
“ 0”
“ 1”
“ 0”
: Disable Watchdog Timer.
: Enable Watchdog Timer.
: Watchdog Timer reset period is 518.144ms +8.096ms.
: Watchdog Timer reset period is 259.072ms +8.096ms.
Function Configuration Register
This register controls the special configuration of WT62P1.
Name Addr R/W Initial Bit 7
OPTION 0FFFh W
00h ENV33
Bit Name
BANK2
BANK3
STEST
DISRST
ENV33
Bit 6
--
Bit 5
--
Bit Value = “1”
Enable RAM 0200h~027Fh
Enable RAM 0280h~02FFh
For IC test only. Do not set this bit.
Disable illegal address reset.
Enable 3.3V regulator.
Weltrend Semiconductor, Inc.
Page 36
Bit4
--
Bit 3
DISRST
Bit Value = “0”
Disable RAM 0200h~027Fh
Disable RAM 0280h~02FFh
For normal operation.
Enable illegal address reset.
Disable 3.3V regulator.
WT62P1
Data Sheet Rev. 1.01
PWM
There are 14 PWMs provided.
PWM0 ~ PWM1 : +5V open-drain output.
PWM2 ~ PWM3 : +10V open-drain output.
PWM4 ~ PWM7 : +5V open-drain output, shared with I/O port D.
PWM8 ~ PWM13 : +5V push-pull output, shared with I/O port A.
The corresponding PWM register controls the PWM duty cycle. Duty cycle range is from 0/256 to
255/256.
LSB 3-bit of PWM register determines which frame will be extended two Tosc. ( Tosc = 1/12MHz)
000 : no extended pulse.
001 : extend two Tosc in frame 4.
010 : extended two Tosc in frame 2 and 6.
011 : extended two Tosc in frame 2, 4 and 6.
100 : extended two Tosc in frame 1, 3, 5 and 7.
101 : extended two Tosc in frame 1, 3, 4, 5 and 7.
110 : extended two Tosc in frame 1, 2, 3, 5, 6 and 7.
111 : extended two Tosc in frame 1, 2, 3, 4, 5, 6 and 7.
MSB 5-bit of PWM register determines 0/32 to 31/32 duty cycle in each frame.
Frame 0
Frame 1
Frame 2
Frame 3
Frame 4
Frame 5 Frame 6
Frame 7
PWM=00001000
2 Tosc
2 Tosc
PWM=00001001
2 Tosc
2 Tosc
2 Tosc
4 Tosc
4 Tosc
4 Tosc
2 Tosc
2 Tosc
2 Tosc
32 Tosc
4 Tosc
PWM=00010010
4 Tosc
6 Tosc
256
Tosc
4 Tosc
Fig. 13 PWM output waveform
Weltrend Semiconductor, Inc.
Page 37
6 Tosc
4 Tosc
WT62P1
Data Sheet Rev. 1.01
PWM Registers
Name
PWM0
PWM1
PWM2
PWM3
PWM4
PWM5
PWM6
PWM7
PWM8
PWM9
PWM10
PWM11
PWM12
PWM13
PWM_EN1
PWM_EN2
Addr
0020h
0021h
0022h
0023h
0024h
0025h
0026h
0027h
0028h
0029h
002Ah
002Bh
002Ch
002Dh
002Eh
002Fh
R/W Initial Bit 7
R/W 80h PWM07
R/W 80h PWM17
R/W 80h PWM27
R/W 80h PWM37
R/W 80h PWM47
R/W 80h PWM57
R/W 80h PWM67
R/W 80h PWM77
R/W 80h PWM87
R/W 80h PWM97
R/W 80h PWM107
R/W 80h PWM117
R/W 80h PWM127
R/W 80h PWM137
W
00h
-W
00h
--
Bit 6
PWM06
PWM16
PWM26
PWM36
PWM46
PWM56
PWM66
PWM76
PWM86
PWM96
PWM106
PWM116
PWM126
PWM136
---
Bit 5
PWM05
PWM15
PWM25
PWM35
PWM45
PWM55
PWM65
PWM75
PWM85
PWM95
PWM105
PWM115
PWM125
PWM135
-EPWM13
Bit4
PWM04
PWM14
PWM24
PWM34
PWM44
PWM54
PWM64
PWM74
PWM84
PWM94
PWM104
PWM114
PWM124
PWM134
-EPWM12
Bit 3
PWM03
PWM13
PWM23
PWM33
PWM43
PWM53
PWM63
PWM73
PWM83
PWM93
PWM103
PWM113
PWM123
PWM133
EPWM7
EPWM11
Bit 2
PWM02
PWM12
PWM22
PWM32
PWM42
PWM52
PWM62
PWM72
PWM82
PWM92
PWM102
PWM112
PWM122
PWM132
EPWM6
EPWM10
Bit Name
Description
PWMX7 ~ PWMX0 Select duty cycle of PWM output.
00000000 : duty cycle = 0
00000001 : duty cycle = 1/256
00000010 : duty cycle = 2/256
:
11111110 : duty cycle = 254/256
11111111 : duty cycle = 255/256
EPWMx
Enable corresponding PWM output. ( x from 4 to 13) when it is set.
Weltrend Semiconductor, Inc.
Page 38
Bit 1
PWM01
PWM11
PWM21
PWM31
PWM41
PWM51
PWM61
PWM71
PWM81
PWM91
PWM101
PWM111
PWM121
PWM131
EPWM5
EPWM9
Bit 0
PWM00
PWM10
PWM20
PWM30
PWM40
PWM50
PWM60
PWM70
PWM80
PWM90
PWM100
PWM110
PWM120
PWM130
EPWM4
EPWM8
WT62P1
Data Sheet Rev. 1.01
USB Interface
The USB interface contains tranceiver, Serial Interface Engine (SIE), 3.3V voltage regulator, FIFOs for
endpoint 0/1 and interface logic circuit.
+3.3V
3.3V Regulator
VDD
EP0 OUT FIFO
1.5K
D-
Serial
Interface
Engine
Tranceiver
EP0 IN FIFO
D+
EP1 IN FIFO
Interface Logic
Interrupt
Data Bus
Fig.14
Block diagram of USB function
3.3V Regulator
The 3.3V regulator generates power for USB tranceiver. It can be enable/disable by the bit-7 of OPTION
register ($0FFFH).
Tranceiver
It is capable of transmitting/receiving serial data at 1.5Mbit/s and complies with USB specification 1.0.
Serial Interface Engine (SIE)
The SIE supports :
Packet protocol sequencing
SOP,EOP,RESUME,RESET signal detection/generation
Clock/data separation
NRZI data encoding/decoding and bit-stuffing
CRC generation and checking (Token and Data)
Packet ID (PID) decoding/generation
Serial-to-Parallel/Parallel-to-Serial conversion
Interface Logic
Main functions of the interface logic circuit are :
USB address and endpoint decoding
USB endpoint level flow control
Maintain state of data toggle bits
Interface to CPU
Weltrend Semiconductor, Inc.
Page 39
WT62P1
Data Sheet Rev. 1.01
FIFO
The FIFO is used to buffer USB data. There are three FIFOs : Endpoint 0 has IN FIFO (transmit) and
OUT FIFO (receive), Endpoint 1 has IN FIFO only. Each FIFO has 8 bytes depth. The architecture of
FIFO is show as blow.
8
7
6
5
DATA IN
4
DATA OUT
3
2
1
0
Write Pointer
Read Pointer
Weltrend Semiconductor, Inc.
Page 40
WT62P1
Data Sheet Rev. 1.01
USB Address Register
Name
Addr R/W Initial Bit 7
USB_ADR 0030h W 00h EN_USB
Bit Name
EN_USB
UAD6 ~ UAD0
Bit 6
UAD6
Bit 5
UAD5
Bit4
UAD4
Bit 3
UAD3
Bit 2
UAD2
Bit 1
UAD1
Bit 0
UAD0
Bit 1
ENOUT
Bit 0
ENSUP
Bit 1
OUT
Bit 0
SETUP
Description
“ 1” : Enable USB function and connect D- pull up resistor.
“ 0” : Disable USB function and disconnect D- pull up resistor.
USB device address.
USB Interrupt Control Register
Name
Addr R/W Initial
USB_ICR 0031h W 00h
Bit Name
ENSTAL1
ENOK1
ENRST
ENSTAL0
ENOK0
ENOUT
ENSUP
Bit 7
--
Bit 6
Bit 5
ENSTAL1 ENOK1
Bit4
Bit 3
Bit 2
ENRST ENSTAL0 ENOK0
Description
Enable Endpoit1 IN token stall interrupt.
Enable Endpoit1 IN token success interrupt.
Enable RESET transaction interrupt.
Enable Endpoit0 IN token stall interrupt .
Enable Endpoit0 IN token success interrupt.
Enable OUT token success interrupt.
Enable ETUP token finished interrupt.
USB Interrupt Status Register
Name
Addr R/W Initial Bit 7
USB_ISR 0031h R 00h ACTIVE
Bit Name
ACTIVE
EP1STAL
EP1OK
RESET
EP0STAL
EP0OK
OUT
SETUP
Bit 6
STALL1
Bit 5
EP1OK
Bit4
RESET
Bit 3
STALL0
Bit 2
EP0OK
Description
“ 1” : Indicate the USB bus is active
“ 0” : Indicate the USB bus is suspended.
When this bit is set, it indicates Endpoit1 IN token stall or failed.
When this bit is set, it indicates Endpoit1 IN token success (ACK).
When this bit is set, it indicates RESET transaction happened
When this bit is set, it indicates Endpoit0 IN token stall or failed.
This bit is set when Endpoit0 IN token finished and ACK token has received.
When this bit is set, it indicates OUT token is received
When this bit is set, it indicates SETUP token is received
USB Endpoint 0 FIFO
Name
Addr R/W Initial
USB_FIFO0 0032h R/W xxh
Bit Name
F0D7 ~ F0D0
Bit 7
F0D7
Bit 6
F0D6
Bit 5
F0D5
Bit4
F0D4
Description
Endpoint 0 FIFO.
Weltrend Semiconductor, Inc.
Page 41
Bit 3
F0D3
Bit 2
F0D2
Bit 1
F0D1
Bit 0
F0D0
WT62P1
Data Sheet Rev. 1.01
USB FIFO Pointer Status Register
Name
Addr R/W Initial Bit 7
Bit 6
USB_FPS 0033h R
-- TOGOUT UNDRN
Bit 5
TXOVF
Bit4
RXEMP
Bit 3
UCNT3
Bit 2
UCNT2
Bit 1
UCNT1
Bit 0
UCNT0
Bit Name
TOGOUT
Description
“ 1” : Indicates the Data packet type of receive data is Data1.
“ 0” : Indicates the Data packet type of receive data is Data0.
UNDRN
FIFO Under-run. When this bit is set, it indicates reading EP0 OUT FIFO when it is
empty..
TXOVF
Transmit FIFO overflow. When this bit is set, it indicates writing data to EP0 IN FIFO
when it is full.
RXEMP
Receive FIFO empty. When this bit is set, it indicates EP0 OUT FIFO is empty.
UCNT3~UCNT0 Read pointer of EP0 OUT FIFO. The value indicates how many data byte stored in
EP0 IN FIFO.
“ 0000” : 0 byte
“ 0001” : 1 byte
:
“ 1000” : 8 byte
USB FIFO Pointer Control Register
Name
Addr R/W Initial
USB_FPC 0033h W
00h
Bit Name
CLRACT
CLRINT
REP0RP
REP0WP
REP1RP
REP1WP
Bit 7
--
Bit 6
--
Bit 5
Bit4
Bit 3
Bit 2
Bit 1
Bit 0
CLRACT CLRINT REP0RP REP0WP REP1RP REP1WP
Description
When this bit is set, it clears the ACTIVE bit. (Bit7 of USB_ISR register)
When this bit is set, it clears the interrupt source
When this bit is set, it resets the read pointer of EP0 IN FIFO.
When this bit is set, it resets the write pointer of EP0 IN FIFO.
When this bit is set, it resets the read pointer of EP1 IN FIFO.
When this bit is set, it resets the write pointer of EP1 IN FIFO.
USB Endpoint 0 Control Register
Name
Addr R/W Initial
Bit 7
USB_CR0 0034h W 00h RESUME
Bit Name
RESUME
OUT0STL
ENOUT0
IN0STL
EP0VAL
EP0TOG
Bit 6
--
Bit 5
--
Bit4
Bit 3
OUT0STL ENOUT0
Bit 2
IN0STL
Bit 1
Bit 0
EP0VAL EP0TOG
Description
Send Resume signal to Host.
Set EP0-OUT pipe stall when this bit is “ 1” .
Enable EP0-OUT pipe when this bit is “ 1” .
Set EP0-IN pipe stall when this bit is “ 1” .
Set EP0-IN FIFO ready to send data when this bit is “ 1” .
Set data packet type of EP0-IN pipe will send
USB Endpoint 1 FIFO
Name
Addr R/W Initial
USB_FIFO1 0035h W
xxh
Bit Name
F1D7 ~ F1D0
Bit 7
F1D7
Bit 6
F1D6
Bit 5
F1D5
Bit4
F1D4
Description
Endpoint 1 IN FIFO.
Weltrend Semiconductor, Inc.
Page 42
Bit 3
F1D3
Bit 2
F1D2
Bit 1
F1D1
Bit 0
F1D0
WT62P1
Data Sheet Rev. 1.01
USB Endpoint1 Control Register
Name
Addr R/W Initial
USB_CR1 0036h W x8h
Bit Name
ENEP1
EP1STL
EP1VAL
EP1TOG
Bit 7
--
Bit 6
--
Bit 5
--
Bit4
--
Bit 3
ENEP1
Bit 2
Bit 1
Bit 0
EP1STL EP1VAL EP1TOG
Descriptions
Enable EP1-IN pipe when this bit is “ 1” .
Set EP1-IN pipe stall when this bit is “ 1” .
Set EP1-IN FIFO ready to send data when this bit is “ 1” .
Set data packet type of EP1-IN pipe. When this bit is “ 1, it is DATA1.
Weltrend Semiconductor, Inc.
Page 43
WT62P1
Data Sheet Rev. 1.01
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings
Parameter
Min.
Max.
DC Supply Voltage (VDD)
-0.3
7.0
Input and output voltage with respect to Ground
-0.3
VDD+0.3
Storage temperature
-25
125
Ambient temperature with power applied
-10
85
*Note: Stresses above those listed may cause permanent damage to the devices
Units
V
V
o
C
o
C
D.C Characteristics (VDD=5.0V±
±5%, Ta=0-70°C)
Symbol
VDD
V33
VIH
VIL
VIH,SYNC
VIL,SYNC
VIH,RES
VIL,RES
VOH
VOL
RDH,USB
ROL,USB
IIL,SYNC
RPH
IDD
VRESET
Parameter
Supply Voltage
3.3V regulator output voltage
Input High Voltage
Input Low Voltage
Sync Input High Voltage
Sync Input Low Voltage
Reset Input High Voltage
Reset Input Low Voltage
Output High Voltage
Output Low Voltage
Output impedance (High
state)
Output impedance (Low
state)
Input Leakage Current
HSYNC and VSYNC pins
Pull High Resistance
Operating Current
Low VDD Reset Voltage
Condition
IOH = -6mA
IOL = 6mA
Min.
4.5
3.0
0.7VDD
-0.3
2.2
-0.3
2.2
-0.3
4
0
Typ.
5
3.3
------4.5
0.26
8
Max.
Units
5.5
V
3.6
V
VDD+0.3
V
0.2VDD
V
VDD+0.3
V
0.8
V
VDD+0.3
V
0.8
V
VDD
V
0.4
V
ohm
8
0V <VIN < VDD
-1
--
1
µA
3.6
20
12
3.9
50
30
4.2
Kohm
mA
V
FOSC= 12MHz, No load
Weltrend Semiconductor, Inc.
Page 44
ohm
WT62P1
Data Sheet Rev. 1.01
A.C Characteristics (VDD=5.0V±
±5%, fosc=12MHz, Ta=0-70°C)
/RESET and /IRQ Timing
Symbol
tLOW,RES
tLOW,IRQ
Parameter
/RESET pin low pulse
/IRQ low pulse (level trigger)
Min.
167
167
Typ.
-
Max.
-
Units
ns
ns
Min.
167
167
Typ.
-
Max.
-
Units
ns
ns
Min.
125
Typ.
-
Max.
500
Units
ns
RESET
IRQ
SYNC Processor Timing
Symbol
tHIGH,SYNC
tLOW,SYNC
Parameter
HSYNC and VSYNC high time
HSYNC and VSYNC low time
HSYNC
VSYNC
tHIGH,SYNC
tLOW,SYNC
DDC1 Timing
Symbol
tVAA,DDC1
Parameter
SDA1 output valid from VSYNC rising edge
SDA1
Bit 0 (LSB)
Null Bit
VSYNC
Weltrend Semiconductor, Inc.
Page 45
Bit 7 (MSB)
WT62P1
Data Sheet Rev. 1.01
DDC2B Timing
Symbol
fSCL
tBF
tHD,START
tSU,START
tHIGH,SCL
tLOW,SCL
tHD,DATA
tSU,DATA
tRISE,DDC
tFALL.DDC
tSU,STOP
Parameter
SCL1 input clock frequency
Bus free time
Hold time for START condition
Set-up time for START condition
SCL1 clock high time
SCL1 clock low time
Hold time for DATA input
Hold time for DATA output
Set-up time for DATA input
Set-up time for DATA output
SCL1 and SDA1 rise time
SCL1 and SDA1 fall time
Set-up time for STOP condition
Min.
0
2
1
1
1
1
0
167
167
334
2
Typ.
-
Max.
100
1
300
-
SDA1
SCL1
Weltrend Semiconductor, Inc.
Page 46
Units
kHz
us
us
us
us
us
ns
ns
ns
ns
us
ns
us
WT62P1
Data Sheet Rev. 1.01
USB Timing
Symbol
tRISE,USB
tFALL,USB
tRFM
VCROSS
Parameter
D+ and D- Rise Time
D+ and D- Fall Time
D+ and D- Rise/Fall Time Matching
Crossover point
Min.
75
75
70
1.3
D+ , DtRISE,USB
tRISE,USB
Weltrend Semiconductor, Inc.
Page 47
Typ.
Max.
300
300
130
2.0
Units
ns
ns
%
V
WT62P1
Data Sheet Rev. 1.01
TYPICAL APPLICATION CIRCUIT
Crystal Oscillator
Reset Pin and 3.3V Regulator
PWM Output
Weltrend Semiconductor, Inc.
Page 48
WT62P1
Data Sheet Rev. 1.01
Hsync, Vsync and DDC Interface Protection
Weltrend Semiconductor, Inc.
Page 49