Rev. 1.00, 09/03, page 516 of 704
Table 18.3 A/D Conversion Time (Single Mode)
CKS1 = 0
CKS1 = 1
CKS0 = 0
CKS0 = 1
CKS0 = 0
CKS0 = 1
Item
Symbol Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max.
A/D
conversion
start delay
time
t
D
18 — 33
10 — 17
6 — 9
4 — 5
Input
sampling
time
t
SPL
— 127
—
— 63 —
— 31 —
— 15 —
A/D
conversion
time
t
CONV
515 — 530
259 — 266
131 — 134
67 — 68
Note: Values in the table are the number of states.
Table 18.4 A/D Conversion Time (Scan Mode)
CKS1
CKS0
Conversion Time (State)
0 512
(Fixed)
0
1 256
(Fixed)
0 128
(Fixed)
1
1 64
(Fixed)
18.4.4
External Trigger Input Timing
A/D conversion can be started by an external trigger input. When the TRGS1 and TRGS0 bits in
ADCR are set to 11, an external trigger input is enabled at the
ADTRG
pin. A falling edge at the
ADTRG
pin sets the ADST bit in ADCSR to 1, 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
18.3 shows the timing.
Summary of Contents for H8S/2437
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