z8f1621 ZiLOG Semiconductor, z8f1621 Datasheet - Page 177

• Manufacturer Part Number: z8f1621
• Description: High Performance 8-bit Microcontrollers
• Manufacturer: ZiLOG Semiconductor

DMA Control Register Definitions
Table 77. DMAx Control Register (DMAxCTL)
PS019921-0308
BITS
FIELD
RESET
R/W
ADDR
Caution:
DMAx Control Register
DEN
7
The DMAx Control register (see
operation for DMAx.
DEN—DMAx Enable
0 = DMAx is disabled and data transfer requests are disregarded.
1 = DMAx is enabled and initiates a data transfer upon receipt of a request from the
DLE—DMAx Loop Enable
0 = DMAx reloads the original Start Address and is then disabled after the End
Address data is transferred.
–
–
–
When using the DMA_ADC to perform conversions on multiple ADC inputs,
the Analog-to-Digital Converter must be configured for SINGLE-SHOT mode.
If the ADC_IN field in the DMA_ADC Control Register is greater than 000b,
the ADC must be in SINGLE-SHOT mode.
CONTINUOUS mode operation of the ADC can only be used in conjunction
with DMA_ADC if the ADC_IN field in the DMA_ADC Control Register is re-
set to 000b to enable conversion on ADC Analog Input 0 only.
trigger source.
Enable the DMA_ADC interrupt request, if desired
Select the number of ADC Analog Inputs to convert
Enable the DMA_ADC channel
DLE
6
DDIR
5
IRQEN
Table 77
4
FB0H, FB8H
R/W
0
on page 163) enables and selects the mode of
WSEL
3
Z8 Encore! XP
2
Direct Memory Access Controller
Product Specification
RSS
1
®
F64XX Series
0
163