h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 641

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Table 16.4 A/D Conversion Time (Single Mode)
Note: Values in the table are the number of states.
Table 16.5 A/D Conversion Time (Scan Mode)
16.4.4
A/D conversion can be externally triggered. When the TRGS1 and TRGS0 bits are set to 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 if the ADST bit has been set to 1 by software. Figure 16.6 shows the
timing.
Item
A/D conversion start delay t
Input sampling time
A/D conversion time
CKS1
0
1
External Trigger Input Timing
0
1
0
1
CKS0
Conversion Time (State)
512 (Fixed)
256 (Fixed)
128 (Fixed)
64 (Fixed)
Symbol Min Typ Max Min Typ Max Min Typ Max Min Typ Max
t
t
D
SPL
CONV
18
—
55
CKS0 = 0
—
127 —
—
33
530 259 —
CKS1 = 0
10
—
CKS0 = 1
Rev. 5.00 Sep 22, 2005 page 615 of 1136
—
63
17
—
266 131 —
6
—
CKS0 = 0
Section 16 A/D Converter
—
31
9
—
134 67
CKS1 = 0
REJ09B0257-0500
4
—
CKS0 = 1
—
15
—
5
—
68