ADUC7033BSTZ-88 View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'ADUC7033BSTZ-88' PDF : 140 Pages View PDF
ADuC7033
PLLCON Prewrite Key PLLKEY0
Name:
PLLKEY0
Address:
0xFFFF0410
Access:
Write only
Key:
0x000000AA
Function:
PLLCON is a keyed register that requires a
32-bit key value to be written before and after
PLLCON. PLLKEY0 is the prewrite key.
PLLCON Postwrite Key PLLKEY1
Name:
PLLKEY1
Address:
0xFFFF0418
Access:
Write only
Key:
0x00000055
Function:
PLLCON is a keyed register that requires a
32-bit key value to be written before and after
PLLCON. PLLKEY1 is the postwrite key.
PLLCON Register
Name:
PLLCON
Address:
0xFFFF0414
Default
0x00
Value:
Access:
Read/write
Function:
This 8-bit register allows user code
dynamically select the PLL source clock from
three different oscillator sources.
Table 45. PLLCON MMR Bit Designations
Bit
Description
31 to 2
1 to 0
Reserved, these bits should be written as 0 by user
code.
PLL Clock Source.1
00 = lower power, 131 kHz oscillator.
01 = precision 131 kHz oscillator.
10 = external 32.768 kHz crystal.
11 = reserved.
1 If the user code switches MCU clock sources, a dummy MCU cycle should be
included after the clock switch is written to PLLCON.
POWCON Prewrite Key POWKEY0
Name:
POWKEY0
Address:
0xFFFF0404
Access:
Write only
Key:
0x00000001
Function:
POWCON is a keyed register that requires a
32-bit key value to be written before and after
POWCON. POWKEY0 is the prewrite key.
POWCON Postwrite Key POWKEY1
Name:
POWKEY1
Address:
0xFFFF040C
Access:
Write only
Key:
0x000000F4
Function:
POWCON is a keyed register that requires a
32-bit key value to be written before and after
POWCON. POWKEY1 is the postwrite key.
POWCON Register
Name:
POWCON
Address:
0xFFFF0408
Default Value: 0x79
Access:
Read/write
Function:
This 8-bit register allows user code to dynami-
cally enter various low power modes and modify
the CD divider that controls the speed of the
ARM7TDMI core.
Rev. B | Page 68 of 140
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