3
Winbond USB Keyboard/HID Controller
Preliminary
Winbond USB Keyboard/HID Controller
(W81281)
RST IDSEL(P30)
LED0-2(P33-P35)
(x3)
P02SO*
INT
USB SIE
XFRI
...
(x18)
8052
Micro
Endpoints
USB
Transceiver
P1SI* Processor
Power Down
Clock
Control
5V to 3.3V
(x8)
Generator
Watch Dog
Conversion
EFT, LVRST
Timer
*P02SO: P00-P07,P20-P27,SCO16,SCO17
X1
X2
*P1SI:P10-P17
PSCL PSDA
(P32) (P31) External Clock Circuit
VDD
D-
D+
VSS
VBUS
Publication Release Date:
1999
60