Renesas H8S/2318 series, Hardware Manual

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Rev. 5.00, 12/03, page 524 of 1088
Group
Selection
Channel Selection Description
CH2 CH1 CH0 Single Mode (SCAN = 0) Scan Mode (SCAN = 1)
0 0 0 AN0 (Initial value) AN0
1 AN1 AN0, AN1
1 0 AN2 AN0 to AN2
1 AN3 AN0 to AN3
1 0 0 AN4 AN4
1 AN5 AN4, AN5
1 0 AN6 AN4 to AN6
1 AN7 AN4 to AN7
14.2.3 A/D Control Register (ADCR)
Bit : 7 6 5 4 3 2 1 0
TRGS1 TRGS0 — — CKS1 — — —
Initial value : 0 0 1 1 1 1 1 1
R/W : R/W R/W — — R/W R/W — —
ADCR is an 8-bit readable/writable register that enables or disables external triggering of A/D
conversion operations.
ADCR is initialized to H'3F by a reset, and in standby mode or module stop mode.
Bits 7 and 6—Timer Trigger Select 1 and 0 (TRGS1, TRGS0): These bits select enabling or
disabling of the start of A/D conversion by a trigger signal. Only set bits TRGS1 and TRGS0
while conversion is stopped (ADST = 0).
Bit 7
TRGS1 Bit 6
TRGS0
Description
0 0 A/D conversion start by external trigger is disabled (Initial value)
1 A/D conversion start by external trigger (TPU) is enabled
1 0 A/D conversion start by external trigger (8-bit timer) is enabled
1 A/D conversion start by external trigger pin (
ADTRG
) is enabled