7480 datasheet(262/337 Pages) RENESAS

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7480 Group and 7481 Group User's Manual

2-47

APPLICATIONS

2.10.2 Functions Revised from 7477 Group and 7478 Group

The functions of 7480 Group and 7481 Group whose specifications are revised from those of the 7477

Group and 7478 Group are listed in Table 2.10.2.

Table 2.10.2 Functions Revised from 7477 Group and 7478 Group

RAM Sizes

Port P4

Port P5

CNTR Pins

Timer

Noise Margin

A-D Converter

Package

2.10 Differences between 7480 and 7481 Group, and 7477 and 478 Group

7477 Group and 7478 Group

M3747xM4 ..................................... 192 bytes

M3747xM8/E8 ............................... 384 bytes

• I/O port

• CMOS outputs

• In input mode, pull-up transistors

connectable.

• Input port

• Pull-up transistors connectable

• P50, P51 serve as input pins for clock

generator.

Note: The 7477 Group does not have port

P5.

CNTR0 and CNTR1 pins have the alternative

functions of P32 and P33.

Four 8-bit timers

VIL: 0.25 VCC (Max.)

VIH: 0.7 VCC (Min.)

No VREF-off circuit

The M37478Mx/E8-XXXFP and M37478MxT/

E8T-XXXFP packaged in 56P6N-A packages.

7480 Group and 7481 Group

M3748xM4 ........................................ 256 bytes

M3748xM8/E8 .................................. 448 bytes

• I/O port

• N-channel open-drain outputs

• Built-in clamping diodes

• In input mode, P40–P43, P50–P53 pins have

schmidt circuits.

Note: The 7480 Group does not have P42,

P43, and P50–P53 pins.

The 7480 Group and 7481 Group do

not have the clock generator for timers.

CNTR0 and CNTR1 pins have the alternative

functions of P40 and P41.

Two 8-bit timers

Two 16-bit timers

On port P3, P4, and P5 only.

VIL: 0.4 VCC (Max.)

VIH: 0.8 VCC (Min.)

(at VCC = 4.5 V to 5.5 V)

To connect/not to connect between VREF and

ladder resistors is selectable with a VREF-off

circuit.

The M37481Mx/E8-XXXFP and M37481MxT/

E8T-XXXFP are packaged in 44P6N-A

packages.

7480 Datasheet(PDF) 262 Page - Renesas Technology Corp

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