Z8F6421PM020SC Datasheet, PDF (187/299 Pages) Zilog, Inc. – High Performance 8-Bit Microcontrollers Z8 Encore-R 64K Series

Z8 Encore!^® 64K Series
Product Specification
167
Table 80. DMAx End Address Low Byte Register (DMAxEND)
BITS
7
6
5
4
3
2
1
0
FIELD
DMA_END
RESET
X
R/W
R/W
ADDR
FB4H, FBCH
DMA_END—DMAx End Address Low
These bits, with the four upper bits of the DMAx_H register, form a 12-bit address. This
address is the ending location of the DMAx transfer. The full 12-bit address is given by
{DMA_END_H[3:0], DMA_END[7:0]}.
DMA_ADC Address Register
The DMA_ADC Address register (Table 82) points to a block of the Register File to store
ADC conversion values as illustrated in Table 81. This register contains the seven most-
significant bits of the 12-bit Register File addresses. The five least-significant bits are cal-
culated from the ADC Analog Input number (5-bit base address is equal to twice the ADC
Analog Input number). The 10-bit ADC conversion data is stored as two bytes with the
most significant byte of the ADC data stored at the even numbered Register File address.
Table 81 provides an example of the Register File addresses if the DMA_ADC Address
register contains the value 72H.
Table 81. DMA_ADC Register File Address Example
ADC Analog Input Register File Address (Hex)¹
0
720H-721H
1
722H-723H
2
724H-725H
3
726H-727H
4
728H-729H
5
72AH-72BH
6
72CH-72DH
7
72EH-72FH
8
730H-731H
PS019915-1005
Direct Memory Access Controller