7220 datasheet(156/303 Pages) RENESAS

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M37220M3-XXXSP/FP

4.5 Functional description

7220 Group User’s Manual

4-18

Fig. 4.5.8 DA n conversion register (addresses 00DE16 and 00DF16)

Fig. 4.5.9 Port P3 output mode control register (address 00CD16)

b7 b6 b5 b4 b3 b2 b1 b0

DA n conversion register (DAn) (n = 1 and 2) [Address 00DE16, 00DF16]

After reset

R W

DA n Conversion Register

Indeterminate

Name

Functions

DA conversion set

bits

(DAn0–DAn5)

Fix this bit to “0.”

0000

111

1111

: 1/64Vcc

: 2/64Vcc

: 61/64Vcc

: 62/64Vcc

: 63/64Vcc

: 0/64Vcc

Nothing is assigned. This bit is a write disable bit.

When this bit is read out, the value is “ 0.”

R—

b7 b6 b5 b4 b3 b2 b1 b0

Port P3 output mode control register (P3S) [address 00CD16]

Name

Functions

After reset R W

Port P3 Output Mode Control Register

0 : CMOS output

1 : N-channel open-drain output

P30 output structure

selection bit (P30S)

P31 output structure

selection bit (P31S)

Nothing is assigned. These bits are write disable bits.

When these bits are read out, the values are “0.”

0 : CMOS output

1 : N-channel open-drain output

DA1 output enable bit

(DA1S)

0 : P30 input/output

1 : DA1 output

DA2 output enable bit

(DA2S)

0 : P31 input/output

1 : DA2 output

R—

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