Configuration Registers Of The External Bus Interface; Area Select Register (Asr) - Fujitsu MB88121 Application Note

3.1.3 Configuration registers of the external bus interface

The following table list the external bus interface register available in MB91F467D series.
Address
0x000640
0x000644
0x000648
0x00064C
0x000650
0x000654
0x000658
0x00065C
0x000660
0x000664
0x000668
0x00066C
0x000670
0x000678
0x000680
0x000684

3.1.3.1 Area Select Register (ASR)

Register ASR specifies the start address A[31:16] of each chip select area. For example if
start address is 0x00500000, value 0x0050 is assigned to register ASR. The size of each
area can be set in multiples of 64 KB.
In this example CS3 area is configured with start address 0x00500000.
© Fujitsu Microelectronics Europe GmbH
Interfacing MB91460 TO MB88121
Chapter 3 Software
+0
Area select register
ASR0
ASR1
ASR2
ASR3
\
\
ASR6
ASR7
Area wait register
AWR0
AWR2
\
AWR6
Memory configuration register
MCRA
I/O wait register for DMA controller by
IOWR0
Chip select enable Cache enable
register CSER register CHER
Refresh control register RCR
Grey: not used for MB88121B
Table 3-1 External bus interface registers
+1 +2
Area configuration register
MCRB \
fly-by transfer mode
IOWR1 IOWR2
\
\
- 19 -
+3
ACR0
ACR1
ACR2
ACR3
\
\
ACR6
ACR7
AWR1
AWR3
\
AWR7
\
\
Timing control
register TCR
\
MCU-AN-300016-E-V10