z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 300

• Manufacturer Part Number: z16f2811
• Description: High Performance Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Table 156. DMA X List Address Register High (DMAxLARH)
Table 157. DMA X List Address Register Low (DMAxLARL)
PS022006-0207
RESET
RESET
FIELD
ADDR
FIELD
ADDR
BITS
BITS
R/W
R/W
External DMA Signals
R/W
R/W
7
0
7
0
Writing the DMAxLARL register causes the DMA to enter linked list mode.
Two external pins are associated with each DMA channel capable of external transfers
(Channel 3 does not have external DMA capability). They are active low DMAxREQ and
DMAxACK signals. DMAxACK signals are outputs and DMAxREQ are inputs.
DMAxREQ must be asserted for a minimum of one system clock period to generate one
DMA transfer. DMAxREQ is left asserted for multiple transactions and deasserted once
DMAxACK asserts for the last appropriate transfer.
R/W
R/W
6
0
6
0
FFE41EH, FFE42EH, FFE43EH, FFE44EH
FFE41FH, FFE42FH, FFE43FH, FFE44FH
R/W
R/W
5
5
0
0
P R E L I M I N A R Y
R/W
R/W
4
0
4
0
DMAxLARH
DMAxLARL
R/W
R/W
3
3
0
0
R/W
R/W
2
0
2
0
Product Specification
ZNEO
R/W
R/W
1
1
0
0
™
DMA Controller
Z16F Series
R/W
R/W
0
0
0
0
286