h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 564

• Manufacturer Part Number: h8s-2161b
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 18 Host Interface X-Bus Interface (XBS)
Figure 18.1 shows a block diagram of the XBS.
Rev. 3.00 Mar 21, 2006 page 510 of 788
REJ09B0300-0300
CS2/ECS2
Legend:
IDR_1:
IDR_2:
ODR_1:
ODR_2:
STR_1:
STR_2:
HICR:
GA20
HIRQ1
HIRQ11
HIRQ12
HIRQ3
HIRQ4
HIFSD
IOW
CS1
CS3
CS4
HA0
IOR
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
Internal interrupt signals
IBF4 IBF3
Port 4, port 8, port B
Control logic
Figure 18.1 Block Diagram of XBS
Internal data bus
IBF2 IBF1
A20 gate
control
Fast
IDR_3:
IDR_4:
ODR_3:
ODR_4:
STR_3:
STR_4:
HICR2:
HDB7 to HDB0
Input data register_3
Input data register_4
Output data register_3
Output data register_4
Status register_3
Status register_4
Host interface control register 2
interface
ODR_4
ODR_2
STR_4
STR_2
HICR2
ODR_3
ODR_1
STR_3
STR_1
IDR_3
IDR_4
IDR_1
IDR_2
HICR
Bus