SH7052 datasheet(598/919 Pages) RENESAS

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• Bit 4—A/D Continuous Scan (ADCS): Selects either single-cycle scan or continuous scan in

scan mode. This bit is valid only when scan mode is selected. See section 16.4.2, Scan Mode,

for details.

Bit 4:

ADCS

Description

Single-cycle scan

(Initial value)

Continuous scan

• Bits 3 to 0—Reserved: These bits are always read as 1, and should only be written with 1.

16.2.4

A/D Control/Status Register 1 (ADCSR1)

A/D control/status register 1 (ADCSR1) is an 8-bit readable/writable register whose functions

include selection of the A/D conversion mode for A/D1.

ADCSR1 is initialized to H'00 by a power-on reset, and in hardware standby mode and software

standby mode.

Bit:

ADF

ADIE

ADM1

ADM0

CH3

CH2

CH1

CH0

Initial value:

R/W:

R/(W)*

R/W

Note: * Only 0 can be written, to clear the flag.

• Bit 7—A/D End Flag (ADF): Indicates the end of A/D conversion.

Bit 7:

ADF

Description

Indicates that A/D1 is performing A/D conversion, or is in the idle state

(Initial value)

[Clearing conditions]

• When ADF is read while set to 1, then 0 is written to ADF

•••• When the DMAC is activated by ADI2

Indicates that A/D1 has finished A/D conversion, and the digital value has been

transferred to ADDR

[Setting conditions]

• Single mode: When A/D conversion ends

• Scan mode: When all set A/D conversions end

The operation of the A/D converter after ADF is set to 1 differs between single mode and scan

mode.

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