Fujitsu MB90335 Series Hardware Manual page 117

CHAPTER 3 INTERRUPT
3.8 Interruption by μDMAC
3.8.3.2 DMA I/O Register Address Pointer (DIOAH/DIOAL)
DMA I/O register address pointer (DIOAH/DIOAL) sets the I/O address pointer.
The upper address (A23 to A16) is fixed at "00
■ DMA I/O Register Address Pointer (DIOAH/DIOAL)
The DMA I/O register address pointer (DIOAH/DIOAL), a 16-bit length register, indicates the 16 low
order bits (A15 to A00) of the DMA I/O register address. The upper-level address (A23 to A16), containing
all "0" data, can specify any I/O address space from 000000
selection bit) of the DMA control register (DMACS) is set to "updated", the DIOAH/DIOAL will be
incremented by 1 during byte transfer or by 2 during word transfer. If this bit is set to "not updated", the
DIOAH/DIOAL will be fixed. Figure 3.8-8 shows the DIOA configuration.
Figure 3.8-8 Bit Configuration of DMA I/O address Register Pointer (DIOAH/DIOAL)
007925 /007924
H
bit15
DIOAH/
A15
DIOAL
R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
R/W: Readable/Writable
X: Undefined
96
H
DIOAH
bit14 bit13 bit12 bit11 bit10 bit9
A14 A13 A12 A11 A10 A09
FUJITSU MICROELECTRONICS LIMITED
".
H
to 00FFFF
H
DIOAL
bit8 bit7 bit6 bit5 bit4 bit3
A08 A07 A06 A05 A04 A03
MB90335 Series
. If the IF bit (DIOA update/fix
H
bit2 bit1 bit0
Initial value Initial value
A02 A01 A00
XXXX
H
CM44-10137-6E