W83977G Winbond Electronics Corp America, W83977G Datasheet - Page 24

• Manufacturer Part Number: W83977G
• Description: W83877TF plus KBC, CIR, RTC, Pb-free
• Manufacturer: Winbond Electronics Corp America

4.7
4.8
4.9
KDATA
MDATA
KCLK
MCLK
GA20
GP11
(IRQIN2)
KBRST
GP12
(WDTO,
IRRX)
KBLOCK
GP13
(PLEDO,
IRTX)
VBAT
XTAL1
XTAL2
VCC
GND
SYMBOL
SYMBOL
W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
KBC Interface
RTC Interface
POWER PINS
59
60
67
68
56
57
58
20,55,
85,115
25,62,
90,120
PIN
PIN
64
63
61
I/OD 16u
I/OD 16u
I/OD 16u
I/OD 16u
OUT 12t
I/O 12t
OUT 12t
I/O 12t
IN 16tu
I/O 16tu
IN C
O 8t
+5V power supply for the digital circuitry
Ground
I/O
I/O
Keyboard Data
PS2 Mouse Data
Keyboard Clock
PS2 Mouse Clock
CR2A bit6= 0 (default): Keyboard GATE A20 (P21) Output.
CR2A bit6= 1: General purpose I/O port 1, bit 1.
configured as an interrupt channel.
CR2A bit7= 0 (default): Keyboard Reset (P20) Output.
CR2A bit7= 1: General purpose I/O port 1, bit 2.
configured as watchdog timer output or IRRX (SINC if UART C is
used as a simple serial port [W83977AF only] ) input.
CR2B bit0= 0 (default): Keyboard KINH (P17) Input.
CR2B bit0= 1: General purpose I/O port 1, bit 3.
configured as watchdog timer output or IRTX (SOUTC if UART C
is used as a simple serial port [W83977AF only] ) output.
RTC battery voltage input
RTC 32.768Khz Clock Input
RTC 32.768Khz Clock Output
-16
FUNCTION
FUNCTION
It can be
It can be
It can be