UPD75112GF-XXX-3BE View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD75112GF-XXX-3BE

4-Bit Single Chip-Microcomputer

NEC => Renesas Technology 

5.7 ProgrammableThreshold Port (Analog Input Port)

The µPD75116(A) is equipped with 4-bit analog input

pins (PTH00 to PTH03) capable of changing the thresh-

old voltage. These pins are configured as shown in

Figure 5-6.

Sixteen

threshold

voltage

(VREF)

values

(VDD

×

0.5

16

-VDD

×

15.5

16

)

are

available

and

analog

signals

can

be

directly

input.

The analog input port can also be used as a digital

signal input port by selecting VDD ×

7.5

16

for VREF.

Figure 5-6 Block Diagram of Programmable Threshold Port

µPD75112(A), 75116(A)

PTH00

PTH01

PTH02

PTH03

VDD

1

2

R

R

R

MPX

1

2

R

4

Input Buffer

+

–

+

Program-

mable

–

Threshold

Port

Input

+

Latch (4)

–

+

–

Operation

Stop

PTH0

Inter-

nal

Bus

PTHM7

PTHM6

PTHM5

VREF

PTHM4

8

PTHM3

PTHM2

PTHM1

PTHM0

PTHM

21

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