h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 578

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 17 Host Interface [H8S/2138 Group]
17.1.2
Figure 17.1 shows a block diagram of the host interface.
Rev. 4.00 Jun 06, 2006 page 524 of 1004
REJ09B0301-0400
CS2/ECS2
HIRQ11
HIRQ12
HIRQ1
HIFSD
Legend:
IDR1:
IDR2:
ODR1:
ODR2:
STR1:
STR2:
HICR:
GA20
IOW
CS1
HA0
IOR
Block Diagram
Input data register 1
Input data register 2
Output data register 1
Output data register 2
Status register 1
Status register 2
Host interface control register
interrupt
request
Host
Figure 17.1 Block Diagram of Host Interface
Port 4, Port 8
(Internal interrupt signals)
Internal data bus
IBF2
Control
control
logic
Fast
gate
A20
IBF1
HDB7 to HDB0
interface
ODR2
STR2
ODR1
HICR
STR1
IDR1
IDR2
Bus