Hitachi H8S/2338 Series Hardware Manual page 507

Table 13-4 A/D Conversion Time (Single Mode)
Item Symbol
A/D conversion t
D
start delay
Input sampling t
SPL
time
A/D conversion t
CONV
time
Note: Values in the table are the number of states.
Table 13-5 A/D Conversion Time (Scan Mode)
CKS1
0
1
13.4.4 External Trigger Input Timing
A/D conversion can be externally triggered. When the TRGS1 and TRGS0 bits are set to B'11 in
ADCR, external trigger input is enabled at the ADTRG pin. A falling edge at the ADTRG pin sets
the ADST bit to 1 in ADCSR, starting A/D conversion. Other operations, in both single and scan
modes, are the same as when the ADST bit has been set to 1 by software. Figure 13-6 shows the
timing.
498
CKS1 = 0
CKS = 0
Min Typ Max
18 — 33
— 127 —
55 — 530
CKS
0
1
0
1
CKS = 1
Min Typ Max Min Typ Max
4 — 5 10
— 15 — —
67 — 68 259 —
Conversion Time (States)
512 (Fixed)
64 (Fixed)
256 (Fixed)
128 (Fixed)
CKS1 = 1
CKS = 0 CKS = 1
Min Typ Max
— 17 6 —
63 — — 31
266 131 —
9
—
134