HD6413308 Hitachi Semiconductor, HD6413308 Datasheet - Page 234

• Manufacturer Part Number: HD6413308
• Description: Hitachi Single-Chip MicroComputer
• Manufacturer: Hitachi Semiconductor

Table 10-4 (a). A/D Conversion Time (Single Mode)
Item
Synchronization delay
Input sampling time
Total A/D conversion time t
Table 10-4 (b). A/D Conversion Time (Scan Mode)
Item
Synchronization delay
Input sampling time
Total A/D conversion time t
Note: Values in the tables above are numbers of states.
10.3.4 External Trigger Input Timing
A/D conversion can be started by external trigger input at the ADTRG pin. This input is enabled or
disabled by the TRGE bit in the A/D control register (ADCR). If the TRGE bit is set to "1," when
a falling edge of ADTRG is detected the ADST bit is set to "1" and A/D conversion begins.
Subsequent operation is the same as when the ADST bit is set to "1" by software.
Figure 10-6 shows the trigger timing.
Ø
ADTRG
Internal trigger signal
ADST
Figure 10-6. External Trigger Input Timing
Symbol
t
t
Symbol
t
t
D
SPL
CONV
D
SPL
CONV
min
18
—
227
min
18
—
259
CKS = "0"
CKS = "0"
222
typ
—
63
—
typ
—
63
—
max
33
—
242
max
33
—
274
A/D conversion
min
10
—
115
min
10
—
131
CKS = "1"
CKS = "1"
typ
—
31
—
typ
—
31
—
max
17
—
122
max
17
—
138