upd75112 Renesas Electronics Corporation., upd75112 Datasheet - Page 22

• Manufacturer Part Number: upd75112
• Description: 4-bit Single Chip-microcomputer
• Manufacturer: Renesas Electronics Corporation.

22
5.7 ProgrammableThreshold Port (Analog Input Port)
The PD75116 is equipped with 4-bit analog input pins
(PTH00 to PTH03) capable of changing the threshold
voltage. These pins are configured as shown in Figure
5-6.
Sixteen threshold voltage (V
15.5
input.
The analog input port can also be used as a digital
signal input port by selecting V
Figure 5-6 Block Diagram of Programmable Thresh-
16
PD75112, 75116
) are available and analog signals can be directly
old Port
PTH00
PTH01
PTH02
PTH03
1
2
1
2
R
R
R
R
V
DD
REF
) values (V
DD
MPX
4
7.5
16
for V
DD
REF
V
REF
0.5
16
.
-V
+
+
+
+
–
–
–
–
DD
Operation
Stop
Program-
mable
Threshold
Port
Input
Latch (4)
PTHM7
PTHM6
PTHM5
PTHM4
PTHM3
PTHM2
PTHM1
PTHM0
PTH0
PTHM
Input Buffer
8
Inter-
nal
Bus