tmp88ch40img TOSHIBA Semiconductor CORPORATION, tmp88ch40img Datasheet - Page 131

• Manufacturer Part Number: tmp88ch40img
• Description: 8 Bit Microcontroller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

AD Converter Control Register 2
ADCCRB
(0027H)
Note 1: Always set bit0 in ADCCRB to "0" and set bit4 in ADCCRB to "1".
Note 2: When a read instruction for ADCCRB, bit6 to 7 in ADCCRB read in as undefined data.
Note 1: Setting for "−" in the above table are inhibited.
Note 2: Set conversion time setting should be kept more than the following time by Analog reference voltage (VAREF).
-
VAREF = 4.5 to 5.5 V
IREFON
7
ACK
6
DA converter (Ladder resistor) connection
control
AD conversion time select
(Refer to the following table about the con-
version time)
Table 14-1 ACK setting and Conversion time (at CGCR<DV1CK>="0")
Table 14-2 ACK setting and Conversion time (at CGCR<DV1CK>="1")
ACK
ACK
IREFON
Condition
Condition
000
001
010
100
101
000
001
010
100
101
011
110
111
011
110
111
5
15.6 µs and more
Conversion
Conversion
"1"
4
1248/fc
1248/fc
156/fc
312/fc
624/fc
156/fc
312/fc
624/fc
39/fc
78/fc
39/fc
78/fc
time
time
Page 123
3
fc: High Frequency oscillation clock [Hz]
20 MHz
20 MHz
15.6 µs
31.2 µs
62.4 µs
15.6 µs
31.2 µs
62.4 µs
-
-
-
-
-
-
Reserved
Reserved
Reserved
Reserved
ACK
0:
1:
000:
001:
010:
011:
100:
101:
110:
111:
2
Connected only during AD conversion
Always connected
39/fc
Reserved
78/fc
156/fc
312/fc
624/fc
1248/fc
Reserved
16 MHz
16 MHz
19.5 µs
39.0 µs
78.0 µs
19.5 µs
39.0 µs
78.0 µs
-
-
-
-
-
-
1
156.0 µs
156.0 µs
19.5 µs
39.0 µs
78.0 µs
19.5 µs
39.0 µs
78.0 µs
8 MHz
8 MHz
"0"
0
-
-
-
-
(Initial value: **0* 000*)
TMP88CH40IMG
R/W