h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 143

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

7.2
Table 7.1 summarizes the pin configuration of the bus controller.
Table 7.1
7.3
The bus controller has the following registers.
• Bus width control register (ABWCR)
• Access state control register (ASTCR)
• Wait control register H (WTCRH)
• Wait control register L (WTCRL)
• Bus control register H (BCRH)
• Bus control register L (BCRL)
• Pin function control register (PFCR)
Name
Address strobe
Read
High write
Low write
Wait
Input/Output Pins
Register Descriptions
Pin Configuration
AS
RD
HWR
LWR
WAIT
Symbol
I/O
Output
Output
Output
Output
Input
Function
Strobe signal indicating that an external address
space is accessed and address output on
address bus is enabled.
Strobe signal indicating that an external address
space is being read.
Strobe signal indicating that an external address
space is written to, and upper half (D15 to D8) of
data bus is enabled.
Strobe signal indicating that an external address
space is written to, and lower half (D7 to D0) of
data bus is enabled.
Wait request signal when accessing external
address space.
Rev. 2.00 Dec. 05, 2005 Page 105 of 724
Section 7 Bus Controller (BSC)
REJ09B0200-0200