HD64F2145 datasheet(154/829 Pages) RENESAS

tên linh kiện	HD64F2145

Giải thích chi tiết về linh kiện	Hitachi 16-Bit Single-Chip Microcomputer

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154 / 829 page

Rev. 2.0, 08/02, page 114 of 788

6.2

Input/Output Pins

Table 6.1 summarizes the pins of the bus controller.

Table 6.1

Pin Configuration

Symbol

I/O

Function

Output

Strobe signal indicating that address output on the address

bus is enabled (when the IOSE bit in SYSCR is cleared to 0).

,26

Output

I/O select signal (when the IOSE bit in SYSCR is set to 1).

Output

Strobe signal indicating that the external address space is

being read.

+:5

Output

Strobe signal indicating that the external address space is

being written to, and the upper half (D15 to D8) of the data

bus is enabled.

/:5

Output

Strobe signal indicating that the external address space is

being written to, and the lower half (D7 to D0) of the data bus

is enabled.

:$,7

Input

Wait request signal when accessing the external 3-state

access space.

6.3

The bus controller has the following registers. For details on the system control register, refer to

section 3.2.2, System Control Register (SYSCR).

• Bus control register (BCR)

• Wait state control register (WSCR)

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