7733 datasheet(509/940 Pages) RENESAS

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BUILT-IN PROM VERSION

7733 Group User’s Manual

19-3

19.1 EPROM mode

The built-in PROM version has the following two modes :

qNormal operating mode

The microcomputer has the same function as the mask ROM version.

qEPROM mode

Programming to the built-in PROM can be performed. The built-in PROM version enters this mode

______

when “L” level is input to pin RESET.

19.1.1 Pin description

Table 19.1.1 lists the pin description in the EPROM mode.

In the normal operating mode, each pin has the same function as the mask ROM version.

Functions

Apply 5 V ± 10% to pin Vcc, and 0 V to pin Vss.

Apply VPP level when programming or verifying.

Connect to pin Vss.

Connect pins XIN and XOUT via a ceramic resonator

or a quartz-crystal oscillator. When an external clock

is used, the clock should be input to pin XIN, and

pin XOUT should be left open.

Open.

Connect pin AVcc to pin Vcc and pin AVss to pin

Vss.

Connect to pin Vss.

Input pins for low-order 8 bits (A0–A7) of address

Input pins for middle-order 8 bits (A8–A15) of address

I/O pins for 8-bit data (D0–D7)

Input pin for the most significant bit (A16) address

Connect to pin Vss.

_____

P50, P51 and P52 respectively function as PGM,

___

and CE input pins. Connect P53–P56 to pin

Vcc, and P57 to pin Vss.

Connect to pin Vss.

Vcc, Vss

CNVss

BYTE

______

RESET

XIN

XOUT

AVcc, AVss

VREF

P00–P07

P10–P17

P20–P27

P30

P31–P33

P40–P47

P50–P57

P60–P67

P70–P77

P80–P87

Input/Output

––

Input

Output

––

Input

I/O

Input

Name

Power source input

VPP input

Reset input

Clock input

Clock output

Enable output

Analog power source input

Reference voltage input

Address input (A0–A7)

Address input (A8–A15)

Data input/output (D0–D7)

Address input (A16)

Input port P3

Input port P4

Control input

Input port P6

Input port P7

Input port P8

Table 19.1.1 Pin description in EPROM mode

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