SH7018 datasheet(327/431 Pages) RENESAS

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15.6.2

Port E Data Register (PEDR)

The port E data register (PEDR) is a 16-bit readable/writable register that stores port E data. The

bits of this register correspond to the various pins. When a pin functions as a general output, if a

value is written to PEDR, that value is output directly from the pin, and if PEDR is read, the

When a pin functions as a general input, if PEDR is read the pin state, not the register value, is

returned directly. If a value is written to PEDR, that value is written to PEDR but it does not affect

the pin state. Table 15.10 summarizes the port E data register read/write operations.

PEDR is initialized by an external power-on reset. However, it is not initialized by a WDT reset,

in standby mode, or in sleep mode.

Bit:

—

PE14DR PE13DR PE12DR PE11DR PE10DR

PE9DR

PE8DR

Initial value:

R/W:

R/W

Bit:

PE7DR

PE6DR

PE5DR

PE4DR

—

PE2DR

—

PE0DR

Initial value:

R/W:

R/W

Table 15.10 Port E Data Register (PEDR) Read/Write Operations

PEIOR

Pin Function

Read

Write

General input

Pin state

Value is written to PEDR, but does not affect pin

state

Other than general

input

Pin state

Value is written to PEDR, but does not affect pin

state

General output

PEDR value

Write value is output from pin

Other than general

output

PEDR value

Value is written to PEDR, but does not affect pin

state

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