Renesas 7700 FAMILY User Manual page 268

CONNECTION WITH EXTERNAL DEVICES
External data bus width = 16 bits (BYTE = "L")
P8 /T D
3 X 0
P8 /R D
2 X 0
P8 /CLK
1 0
P8 /CTS /RTS
0 0 0
V
CC
AV
CC
V
REF
AV
SS
V
SS
P7 /AN /AD
7 7 TRG
P7 /AN
6 6
P7 /AN
5 5
P7 /AN
4 4
P7 /AN
3 3
P7 /AN
2 2
P7 /AN
1 1
External data bus width = 8 bits (BYTE = "H")
P8 /T D
3 X 0
P8 /R D
2 X 0
P8 /CLK
1 0
P8 /CTS /RTS
0 0 0
V
CC
AV
CC
V
REF
AV
SS
V
SS
P7 /AN /AD
7 7 TRG
P7 /AN
6 6
P7 /AN
5 5
P7 /AN
4 4
P7 /AN
3 3
P7 /AN
2 2
P7 /AN
1 1
Fig. 12.1.1 Pin configuration in memory expansion and microprocessor modes (top view)
12.1 Signals required for accessing external devices
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44
65
66
67
68
69
70
71
M37751M6C-XXXFP
72
73
74
75
76
77
78
79
80
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44
65
66
67
68
69
70
71
M37751M6C-XXXFP
72
73
74
75
76
77
78
79
80
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
7751 Group User's Manual
43 42 41
A /D
40
20 4
A /D
39
21 5
A /D
38
22 6
37 A /D
23 7
36 R/W
35 BHE
34 ALE
33 HLDA
V
32
ss
E
31
X
30
OUT
29 X
IN
RESET
28
CNV
27 SS
BYTE
26
HOLD
25
22 23 24
: As in microprocessor mode
1
: External address bus, external data bus,
bus control signal
43 42 41
40
A /D
20 4
39 A /D
21 5
38 A /D
22 6
37
A /D
23 7
36
R/W
35
BHE
34
ALE
33
HLDA
32 V
ss
31 E
30 X
OUT
29
X
IN
28 RESET
CNV
27
SS
BYTE
26
HOLD
25
: As in microprocessor mode
1
: External address bus, external data bus,
bus control signal
12–3