7220 Datasheet, PDF (250/303 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPENDIX
6.7 Control registers
Port P5 Direction Register
b7 b6 b5 b4 b3 b2 b1 b0
Port P5 direction register (D5) [Address 00CB16]
B
Name
Functions
0, 1 Nothing is assigned. These bits are write disable bits.
When these bits are read out, the values are “0.”
2 Port P5 direction register
to
5
0 : CRT output (R)
1 : Output port P52
0 : CRT output (G)
1 : Output port P53
0 : CRT output (B)
1 : Output port P54
0 : CRT output (OUT1)
1 : Output port P55
6, 7 Nothing is assigned. These bits are write disable bits.
When these bits are read out, the values are “0.”
After reset R W
0 R—
0 RW
0 RW
0 RW
0 RW
0 R—
Fig. 6.7.3 Port P5 direction register
Address 00CB16
Port P3 output mode control register
b7 b6 b5 b4 b3 b2 b1 b0
00
Port P3 output mode control register (P3S) [address 00CD16]
B
Name
0 P30 output structure
selection bit (P30S)
1 P31 output structure
selection bit (P31S)
2, 3 Fix thes bits to “0.”
Functions
After reset ^R W
0 : CMOS output
0 RW
1 : N-channel open-drain output
0 : CMOS output
0 RW
1 : N-channel open-drain output
0 RW
(See note)
4 Nothing is assigned. These bits are write disable bits.
to When these bits are read out, the values are “0.”
7
0 R—
Note: M37220M3-XXXSP/FP
2 DA1 output enable bit
3 DA2 output enable bit
0 : P30 input/output
1 : DA1 output
0 : P31 input/output
1 : DA2 output
Fig. 6.7.4 Port P3 output mode control register
0 RW
0 RW
Address 00CD16
7220 Group User’s Manual
6-31