M37224M3 Datasheet, PDF (33/83 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER

MITSUBISHI MICROCOMPUTERS
M37224M3-XXXSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
DAi Conversion Register
b7 b6 b5 b4 b3 b2 b1 b0
0
DAi conversion register (DAi) (i = 1 and 2) [Address 00DE16, 00DF16]
B
Name
0 to 5, DA conversion set
7 bits
(DAi0 to DAi5)
Functions
b7 b5 b4 b3 b2 b1 b0
0 0 0 0 0 0 0 : 0/128Vcc
1 0 0 0 0 0 1 : 1/128Vcc
0 0 0 0 0 1 0 : 2/128Vcc
After reset R W
Indeterminate R W
1 1 1 1 1 1 0 : 125/128Vcc
0 1 1 1 1 1 1 : 126/128Vcc
1 1 1 1 1 1 1 : 127/128Vcc
6 Fix this bit to “0.”
0
RW
Fig. 31. DAi Conversion Register
Port P3 Output Mode Control Register
b7 b6 b5 b4 b3 b2 b1 b0
Port P3 output mode control register (P3S) [address 00CD16]
B
Name
0 P30 output structure
selection bit (P30S)
Functions
After reset ^R W
0 : CMOS output
0 RW
1 : N-channel open-drain output
1 P31 output structure
selection bit (P31S)
0 : CMOS output
0 RW
1 : N-channel open-drain output
2 DA1 output enable bit
0 : P30 input/output
1 : DA1 output
0 RW
3 DA2 output enable bit
0 : P31 input/output
1 : DA2 output
0 RW
4 Nothing is assigned. These bits are write disable bits.
to When these bits are read out, the values are “0.”
7
0 R—
Fig. 32. Port P3 Output Mode Control Register
33