HD64F3039F18 Datasheet, PDF (137/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

Section 6 Bus Controller
6.1.3 Input/Output Pins
Table 6.1 summarizes the bus controller's input/output pins.
Table 6.1 Bus Controller Pins
Name
Address strobe
Abbreviation
AS
I/O
Output
Read
RD
Output
Write
WR
Output
Wait
WAIT
Input
Function
Strobe signal indicating valid address output on
the address bus
Strobe signal indicating reading from the external
address space
Strobe signal indicating writing to the external
address space, with valid data on the data
bus(D7 to D0)
Wait request signal for access to external three-
state-access areas
6.1.4 Register Configuration
Table 6.2 summarizes the bus controller's registers.
Table 6.2 Bus Controller Registers
Address* Name
H'FFED
Access state control register
H'FFEE
Wait control register
H'FFEF
Wait state controller enable register
H'FFF3
Address control register
Note: * Lower 16 bits of the address.
Abbreviation
ASTCR
WCR
WCER
ADRCR
R/W Initial Value
R/W H'FF
R/W H'F3
R/W H'FF
R/W H'FE
Rev.3.00 Mar. 26, 2007 Page 113 of 682
REJ09B0353-0300