W6694 Datasheet, PDF (7/33 Pages) Winbond – USB Bus ISDN S/T-Controller

Preliminary W6694
4. Pin Description, continued
SYMBOL
PIN NO. I/O
FUNCTION
External Serial EEPROM Interface
EPCS
17
O Serial EEPROM chip select.
EPSK
18
O Serial EEPROM data clock.
EPDI
19
I Serial EEPROM data input
EPDO
20
O Serial EEPROM data output
Power and Ground
VDD1,VSS1
47, 44
I ISDN S/T analog power (5V), Ground
VDD21, VSS21
5, 4
I Digital power (5V), Ground
VDD22, VSS22
14, 13
VDD23, VSS23
24, 23
VDDU, VSSU
37, 36
I USB core power (5V), Ground
VDD3
40
O Regulator output (3.3V)
VDD3I
43
I Regulator input (3.3V)
IO Pins
IOP0
26
I/O IO pin capable of driving LED.
IOP1
27
I/O
IOP2
28
I/O
IOP3
29
I/O
IOP4
30
I/O
IOP5
31
I/O
IOP6
32
I/O
IOP7
33
I/O
Others
RESET
25
I External reset. Cause internal circuit reset. Internal 10k
ohm pull-up is provided.
TEST1, TEST2 ^{21, 22}
I Test mode enable. Connected to HIGH for normal
operation.
SUSP
34
O USB suspended. Active HIGH
NC
NC
35
No connection. Internal pull-up is provided.
Publication Release Date: October 2000
-7-
Revision A1