HD404392 데이터 시트보기 (PDF) - Hitachi -> Renesas Electronics

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HD404392

4-bit microcomputers

Hitachi -> Renesas Electronics 

HD404344R Series/HD404394 Series

Table 1 Initial Values After MCU Reset (cont)

Item

Abbr.

Initial Value Contents

A/D

A/D mode register 1 (AMR1)

0000

Refer to description of A/D mode

register

A/D mode register 2 (AMR2)

---0

Refer to description of A/D mode

register

Bit register Watchdog timer on flag (WDON)

0

Refer to description of timer C

A/D start flag

(ADSF)

0

Refer to description of A/D

converter

IAD off flag

(IAOF)

0

Refer to description of A/D

converter

Others

Miscellaneous register (MIS)

00 - -

Refer to description of I/O, and

serial interface

Notes: 1. The statuses of other registers and flags after MCU reset are shown in the following table.

2. X indicates invalid value. – indicates that the bit does not exist.

Table 1 Initial Values After MCU Reset (cont)

After Stop Mode

Release by STOPC

Input

After Stop Mode After Other Types

Release by RESET of MCU Reset

Input

Carry

(CA)

Program needs to initialize these registers.

Program needs to

initialize these

registers.

Accumulator

(A)

B register

(B)

W register

(W)

X/SPX register

(X/SPX)

Y/SPY register

(Y/SPY)

Serial data register (SRU, SRL)

A/D data register

(ADRU, ADRL)

RAM

Data before entering stop mode are kept.

RAM enable flag

(RAME)

1

0

0

Port mode register B (PMRB3)

Data before entering 0

0

bit 3

stop mode are kept.

24

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