z8f1601 ZiLOG Semiconductor, z8f1601 Datasheet - Page 142

• Manufacturer Part Number: z8f1601
• Description: Z8 Encore!? Microcontroller With Flash Memory And 10-bit A/d Converter
• Manufacturer: ZiLOG Semiconductor

DMA Control Register Definitions
Table 71. DMAx Control Register (DMAxCTL)
PS017609-0803
RESET
FIELD
ADDR
BITS
R/W
Configuring DMA_ADC for Data Transfer
Caution:
DMAx Control Register
DEN
R/W
7
0
Follow these steps to configure and enable DMA_ADC:
1. Write the DMA_ADC Address register with the 7 most-significant bits of the Register
2. Write to the DMA_ADC Control register to complete the following:
The DMAx Control register is used to enable and select the mode of operation for DMAx.
DEN—DMAx Enable
0 = DMAx is disabled and data transfer requests are disregarded.
If the current ADC Analog Input is not the highest numbered input to be converted,
DMA_ADC initiates data conversion in the next higher numbered ADC Analog Input.
File address for data transfers.
–
–
–
Enable the DMA_ADC interrupt request, if desired
Select the number of ADC Analog Inputs to convert
Enable the DMA_ADC channel
When using the DMA_ADC to perform conversions on multiple ADC in-
puts and the ADC_IN field in the DMA_ADC Control Register is greater
than 000b, the Analog-to-Digital Converter must be configured for 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 reset to 000b to enable conversion on ADC Analog Input 0 only.
DLE
R/W
6
0
DDIR
R/W
5
0
IRQEN
R/W
4
0
FB0H, FB8H
Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
WSEL
R/W
3
0
Direct Memory Access Controller
R/W
2
0
R/W
RSS
1
0
Z8 Encore!
R/W
0
0
®
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