w83l950d Winbond Electronics Corp America, w83l950d Datasheet - Page 53

• Manufacturer Part Number: w83l950d
• Description: Peripheral Personal Computer Keyboard Controller
• Manufacturer: Winbond Electronics Corp America

11.21 Port Control Register 3 (PCTRL3)
Bit 3: GP8 function selection bit
Bit 2: GP4 output structure selection bit
Bit 1: GP7 input level selection bit
Bit 0: GP4 input level selection bit
SFR address
Default value
Bit 7: TIMER1, 2 count stop bit
Bit 6: GP77 – GP76 interface select.
Bit 5: GP77 – GP76 output structure select
Bit 4: GP75 – GP70 output structure select
Bit 3-2: Pin 36-35 function select
(Note: When select item 10b, the TxD/RxD is routed to Pin 35,36, otherwise is routed to Pin
20, 21, if SERIAL IO1 is enabled.
In other words, if enable SERIAL IO1, the output pin is either Pin35, 36 or Pin20, 21.)
Bit 1: PWM3 output enable
= 0 INT20/30/40 INTERRUPT
= 1 INT21/31/41 INTERRUPT
= 0 Port GP8/Port GP8 direction register
= 1 Port 4 input register / Port 7 input register
= 0 CMOS
= 1 N-Channel open drain
= 0 CMOS level input
= 1 TTL level input
= 0 CMOS level input
= 1 TTL level input
= 0 Count start
= 1 Count stop
= 0 GPIO function.
= 1 SMBus 0 interface.
= 0 CMOS TYPE
= 1 N-channel TYPE open drain.
(Note: This feature is disabled now, and they are open drain only.)
= 0 CMOS TYPE
= 1 N-channel TYPE open drain.
(Note: This feature is disabled now, and they are open drain only.)
= 00 GPIO
= 01 Auxiliary SMBus interface, SCL1, SDA1.
= 10 SERIAL I/O 1 TxD, RxD
= 11 Reserved.
0x9C
0x00
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W83L950D