Rainbow Electronics AT89C5122 - Manual (Page 18)

18
AT8xC5122/23
4202E–SCR–06/06
USB Keyboard with Smart Card Reader Using the AT8xC5122 and AT89C5122DS Versions
LEDx
VCC
KB1
KB2
KB3
KB4
KB5
KB6
KB7
R1
9
R1
8
R1
7
R1
6
R1
5
P3[0-1,3-4]
P2[0-7]
R1
4
R1
3
R1
2
R1
1
R1
0
R0
9
R0
8
P0[0-7]
R0
7
R0
6
R0
5
R0
4
R0
3
R0
2
R0
1
R0
0
Keyboard Matrix
C1
C2
C3
C4
C5
C6
C7
KB0
C0
GND
C1
EA/VCC (1)
GND GND
C8 C9
VCC
VCC
VCC AVCC
XTAL2 XTAL1
Q1
VCC
R2
GND
D-
D+
VREF
D+
D-
VCC
VBUS
GND
USB
R3
R1
AVSS
GND
C2
R4
C3
PLLF
VSS
GND
GND
C4
DVCC
10mA Max
GND
CCLK1
CRST1
CIO1
RST
CLK
I/O
C2
C3
C7
VCC
C1
GND
C5
Alternate Card
VCC
GND
RST
Optional
Capacitor
C10
Notes :
1 - Pin configuration depends on product versions
LI
L1
Smart Card
C1
C2
C3
C4
C7
C8
C5
VCC
RST
CLK
C4
I/O
C8
GND
S1
CPRES
S2
GND
GND
C6
S1
C7
CC8
CIO
CC4
CCLK
CRST
CVSS
CVCC
VCC
R5