HD643303x Hitachi, HD643303x Datasheet - Page 401

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

Table 12-4 A/D Conversion Time (Single Mode)
Synchronization delay
Input sampling time
A/D conversion time
Note: Values in the table are numbers of states.
12.4.4 External Trigger Input Timing
A/D conversion can be externally triggered. When the TRGE bit is set to 1 in ADCR, external
trigger input is enabled at the ADTRG pin. A high-to-low transition 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 if the ADST bit had been set to 1 by software. Figure 12-6 shows the
timing.
ø
ADTRG
Internal trigger
signal
ADST
Figure 12-6 External Trigger Input Timing
Symbol
t
t
t
D
SPL
CONV
Min
10
—
259
386
CKS = 0
Typ
—
80
—
Max
17
—
266
A/D conversion
Min
6
—
131
CKS = 1
Typ
—
40
—
Max
9
—
134