ADUC7023BCPZ62I Datasheet, PDF (50/96 Pages) Analog Devices – Precision Analog Microcontroller, 12-Bit Analog I/O, ARM7TDMI MCU with Enhanced IRQ Handler

ADuC7023
Table 52. POWCON0 Write Sequence
Name
Code
POWKEY1
0x01
POWCON0
User value
POWKEY2
0xF4
POWKEY3 Register
Name:
POWKEY3
Address:
0xFFFF0434
Default value: 0xXXXX
Access:
Write
Function:
POWKEY3 prevents accidental
programming to POWCON1.
POWKEY4 Register
Name
POWKEY4
Address
0xFFFF043C
Default Value 0xXXXX
Access
Write
Function:
POWKEY4 prevents accidental
programming to POWCON1.
POWCON1 Register
Name:
POWCON1
Address:
0xFFFF0438
Default value: 0x0004
Access:
Read/write
Data Sheet
Table 53. POWCON1 MMR Bit Designations
Bit
Value
Name
Description
15 to 9
Reserved.
8
SPIPO
Clearing this bit powers
down the SPI.
7 to 6
SPICLKDIV SPI block driving clock
divider bits.
00
41.78 MHz.
01
20.89 MHz.
10
10.44 MHz.
11
5.22 MHz.
5
I2C1PO
Clearing this bit powers
down the I²C1.
4 to 3
I2C1CLKDIV I²C0 block driving clock
divider bits.
00
41.78 MHz.
01
10.44 MHz.
10
5.22 MHz.
11
1.31 MHz.
2
I2C0PO
Clearing this bit powers
down the I²C0.
1 to 0
I2C0CLKDIV I²C1 block driving clock
divider bits.
00
41.78 MHz.
01
10.44 MHz.
10
5.22 MHz.
11
1.31 MHz.
1 _{Divided clock for SPI/I2C0/I2C1 must be greater than or equal to the CPU}
clock as selected by POWCON0[2:0]
Table 54. POWCON1 Write Sequence
Name
Code
POWKEY3
0x76
POWCON1
User value
POWKEY4
0XB1
Rev. E | Page 50 of 96