W83L517D_05 Datasheet, PDF (20/133 Pages) Winbond – LPC I/O for Notebook

W83L517D/W83L517D-F
KBC and FLASH ROM Interface, continued
SYMBOL
MEMR#
(GP12)
PIN
I/O
67
O12t
I/O12t
MEMW#
(GP13)
68
O12t
I/O12t
ROMCS#
(GP14)
69
OD12
I/OD12
FUNCTION
Flash ROM interface Memory Read Enable
General purpose I/O PORT 1 ,
Flash ROM interface Memory Write Enable
General purpose I/O PORT 1 ,
Flash ROM interface Chip Select
General purpose I/O PORT 1 ,
(PENROM#)
XA0
(GP15)
XA1
(GP26)
XA2
(GP27)
XA3-XA10
(GP40-
GP47)
XA11-XA18
(GP50-
GP57)
70
71
72
73-80
81-84
86-89
IN_t
O
I/O_12t
O
I/O_12t
O
I/O_12t
O
I/O_12t
During power-on reset , this pin is pulled down internally and is
defined as PENROM# and decoded memory address of BIOS
to output selected signal, which provides the power on value
for CR24 bit 1. A 4.7kΩ is recommended if intends to pull up
and disable BIOS ROM function .
Flash ROM interface Address 0.
General purpose I/O PORT 1 ,
Flash ROM interface Address 1.
General purpose I/O PORT 2 ,
Flash ROM interface Address 2.
General purpose I/O PORT 2 ,
Flash ROM interface Address [3:10].
General purpose I/O PORT 4 ,
O
I/O_12t
Flash ROM interface Address [11:18].
General purpose I/O PORT 5 ,
4.6 POWER PINS
SYMBOL
PIN
VCC3V
15, 51
VCC
GND
40, 90
10, 35, 61, 85
FUNCTION
+3.3V power supply for core logic and driving 3V on host
interface.
+5V or +3.3V power supply for device output pad.
Ground.
- 20 -