Z8F6421PM020SC Datasheet, PDF (189/299 Pages) Zilog, Inc. – High Performance 8-Bit Microcontrollers Z8 Encore-R 64K Series

Z8 Encore!^® 64K Series
Product Specification
169
Table 83. DMA_ADC Control Register (DMAACTL)
BITS
7
6
5
4
3
2
1
0
FIELD ^{DAEN IRQEN}
Reserved
ADC_IN
RESET
0
R/W
R/W
ADDR
FBEH
DAEN—DMA_ADC Enable
0 = DMA_ADC is disabled and the ADC Analog Input Number (ADC_IN) is reset to 0.
1 = DMA_ADC is enabled.
IRQEN—Interrupt Enable
0 = DMA_ADC does not generate any interrupts.
1 = DMA_ADC generates an interrupt after transferring data from the last ADC Analog
Input specified by the ADC_IN field.
Reserved
These bits are reserved and must be 0.
ADC_IN—ADC Analog Input Number
These bits set the number of ADC Analog Inputs to be used in the continuous update (data
conversion followed by DMA data transfer). The conversion always begins with ADC
Analog Input 0 and then progresses sequentially through the other selected ADC Analog
Inputs.
0000 = ADC Analog Input 0 updated.
0001 = ADC Analog Inputs 0-1 updated.
0010 = ADC Analog Inputs 0-2 updated.
0011 = ADC Analog Inputs 0-3 updated.
0100 = ADC Analog Inputs 0-4 updated.
0101 = ADC Analog Inputs 0-5 updated.
0110 = ADC Analog Inputs 0-6 updated.
0111 = ADC Analog Inputs 0-7 updated.
1000 = ADC Analog Inputs 0-8 updated.
1001 = ADC Analog Inputs 0-9 updated.
1010 = ADC Analog Inputs 0-10 updated.
1011 = ADC Analog Inputs 0-11 updated.
1100-1111 = Reserved.
DMA Status Register
The DMA Status register (Table 84) indicates the DMA channel that generated the inter-
rupt and the ADC Analog Input that is currently undergoing conversion. Reads from this
register reset the Interrupt Request Indicator bits (IRQA, IRQ1, and IRQ0) to 0. There-
PS019915-1005
Direct Memory Access Controller