2
Figure 1. Port Interface Schematic.
PA3 31
XT
8
EX
7
RESET
17
IRQ
19
XIRQ
18
MODB
2
PA0
34
PA1
33
PA2
32
PE0
43
PE1
44
PE2
45
PE3
46
PE4
47
PE5
48
PE6
49
PE7
50
VRH
52
VRL
51
PA4 30
PA5 29
PA6 28
PA7 27
PB0 42
PB1 41
PB2 40
PB3 39
PB4 38
PB5 37
PB6 36
PB7 35
PC0 9
PC1 10
PC2 11
PC3 12
PC4 13
PC5 14
PC6 15
PC7 16
PD0 20
PD1 21
PD2 22
PD3 23
PD4 24
PD5 25
MODA 3
E 5
AS 4
R/W 6
DO
1
2
SEL
3
OE
4
U/D
5
NC
6
RST
7
CHB
8
CHA
9
VSS
10
VDD 20
D1 19
D2 18
D3 17
CNTDCDR 16
CNTCAS 15
D4 14
D5 13
D6 12
D7 11
68HC11E9
U1
HCTL-2020
U2
Vcc
NOTE: 68HC11E9 IS IN THE SINGLE CHIP MODE.
REFER TO THE 68HC11E9 REFERENCE MANUAL FOR DETAILS.
5563-1
CLK
