ADUC7021_15 Datasheet, PDF (81/104 Pages) Analog Devices – Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI MCU

Data Sheet
Table 148. PLACLK Register
Name
Address
PLACLK
0xFFFF0B40
Default Value
0x00
Access
R/W
PLACLK is the clock selection for the flip-flops of Block 0 and
Block 1. Note that the maximum frequency when using the
GPIO pins as the clock input for the PLA blocks is 44 MHz.
Table 149. PLACLK MMR Bit Descriptions
Bit Value
Description
7
Reserved.
6:4
Block 1 clock source selection.
000
GPIO clock on P0.5.
001
GPIO clock on P0.0.
010
GPIO clock on P0.7.
011
HCLK.
100
OCLK (32.768 kHz) external crystal only.
101
Timer1 overflow.
Other
Reserved.
3
Reserved.
2:0
Block 0 clock source selection.
000
GPIO clock on P0.5.
001
GPIO clock on P0.0.
010
GPIO clock on P0.7.
011
HCLK.
100
OCLK (32.768 kHz) external crystal only.
101
Timer1 overflow.
Other
Reserved.
Table 152. Feedback Configuration
Bit
Value
PLAELM0
10:9
00
Element 15
01
Element 2
10
Element 4
11
Element 6
8:7
00
Element 1
01
Element 3
10
Element 5
11
Element 7
PLAELM1 to PLAELM7
Element 0
Element 2
Element 4
Element 6
Element 1
Element 3
Element 5
Element 7
ADuC7019/20/21/22/24/25/26/27/28/29
Table 150. PLAIRQ Register
Name
Address
PLAIRQ
0xFFFF0B44
Default Value
0x00000000
Access
R/W
PLAIRQ enables IRQ0 and/or IRQ1 and selects the source
of the IRQ.
Table 151. PLAIRQ MMR Bit Descriptions
Bit
Value Description
15:13
Reserved.
12
PLA IRQ1 enable bit. Set by user to enable
IRQ1 output from PLA. Cleared by user to
disable IRQ1 output from PLA.
11:8
PLA IRQ1 source.
0000 PLA Element 0.
0001 PLA Element 1.
1111 PLA Element 15.
7:5
Reserved.
4
PLA IRQ0 enable bit. Set by user to enable
IRQ0 output from PLA. Cleared by user to
disable IRQ0 output from PLA.
3:0
PLA IRQ0 source.
0000 PLA Element 0.
0001 PLA Element 1.
1111 PLA Element 15.
PLAELM8
Element 7
Element 10
Element 12
Element 14
Element 9
Element 11
Element 13
Element 15
PLAELM9 to PLAELM15
Element 8
Element 10
Element 12
Element 14
Element 9
Element 11
Element 13
Element 15
Rev. F | Page 81 of 104