HD64F7018X20 Просмотр технического описания (PDF) - Renesas Electronics

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HD64F7018X20

Hitachi SuperH™ RISC engine

Renesas Electronics 

Table 1.2 Pin Functions (cont)

Type

Abbreviation I/O

Name

Function

A/D converter

AVCC

Input

Analog power

supply

Connect to VCC potential when

using an analog power supply.

AVSS

Input

Analog ground

Connect to Vss potential when

using an analog power supply.

AN0 to AN7 Input Analog inputs

Analog signal input terminals.

I/O ports

PA15, 14,

12 to 0

Input/ General port

output

General I/O port pins. I/O can be

specified one bit at a time.

PB9 to 0

Input/ General port

output

General I/O port pins. I/O can be

specified one bit at a time.

PC15 to 0

Input/ General port

output

General I/O port pins. I/O can be

specified one bit at a time.

PD7 to 0

Input/ General port

output

General I/O port pins. I/O can be

specified one bit at a time.

PE14 to 4, 2, 0 Input/ General port

output

General I/O port pins. I/O can be

specified one bit at a time.

PF7 to 0

Input General port

General I/O port pins.

Note:

The following power-on/power-off order is recommended.

1. Powering on

(1) Turn on the 5 V power (PVCC) first, then the 3 V power (VCC, PLLVCC, AVCC).

(2) Pin states are undefined while only 5 V power is on, as reset input is invalid.

2. Powering off

(1) Power off in the reverse order to powering on: turn off the 3 V power first, then the 5

V power.

(2) Pin states are undefined while only 5 V power is being supplied.

3. Power-on/off interval

To minimize the length of time during which pin states are undefined, the power-on/off

interval should be kept as short as possible. Also, the system design should ensure that

erroneous system operation will not result from pin states becoming undefined.

9

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