SH7052 datasheet(37/919 Pages) RENESAS

37 / 919 page

Table 1.2

Pin Functions (cont)

Type

Symbol

Pin No.

I/O

Name

Function

Operating

mode control

MD0 to

MD2

18, 22, 23

Input

Mode setting

These pins determine the

operating mode. Do not

change the input values

during operation.

HSTBY

Input

Hardware

standby

When driven low, this pin

forces a transition to hardware

standby mode.

Interrupts

NMI

Input

Nonmaskable

interrupt

Nonmaskable interrupt

request pin.

Acceptance on the rising edge

or falling edge can be

selected.

IRQ0 to

IRQ3

116, 119,

120, 121

Input

Interrupt

requests

0 to 3

Maskable interrupt request

pins.

Level input or edge input can

be selected.

Address bus

A0 to A21

1 to 5,

188 to 193,

195,

197 to 204,

206, 208

Output

Address bus

Address output pins.

Data bus

D0 to D15

35 to 41,

43, 45 to 52

Input/

output

Data bus

16-bit bidirectional data bus

pins.

Bus control

CS0 to

CS3

11, 13 to 15 Output

Chip select

0 to 3

Chip select signals for

external memory or devices.

Output

Read

Indicates reading from an

external device.

WRH

Output

Upper write

Indicates writing of the upper

8 bits of external data.

WRL

Output

Lower write

Indicates writing of the lower 8

bits of external data.

WAIT

Input

Wait

Input for wait cycle insertion in

bus cycles during external

space access.

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