Unified System Interface Unit (USIU) Overview
MPC561/MPC563 Reference Manual, Rev. 1.2
5-6
Freescale Semiconductor
5.1.1
USIU Special-Purpose Registers
lists the MPC561/MPC563 special purpose registers (SPR) used by the USIU. These registers
reside in an alternate internal memory space that can only be accessed with the mtspr and mfspr
instructions, or from an external master (refer to
Section 6.1.2, “External Master Modes
,” for details). All
registers are 32 bits wide.
NOTE
RCPU special purpose registers cannot be accessed by an external master.
Only SPRs in the USIU can be accessed by an external master.
0x2F C320
Real-Time Clock Status and Control Key (RTCSCK)
See
for bit descriptions.
0x2F C324
Real-Time Clock Key (RTCK)
See
for bit descriptions.
0x2F C328
Real-Time Alarm Seconds Key (RTSECK)
See
for bit descriptions.
0x2F C32C
Real-Time Alarm Key (RTCALK)
See
for bit descriptions.
0x2F C330–0x2F C33C Reserved
0x2F C340
PIT Status and Control Key (PISCRIK)
See
for bit descriptions.
0x2F C344
PIT Count Key (PITCK)
See
for bit descriptions.
0x2F C348–0x2F C37C Reserved
Clocks and Reset Keys
0x2F C380
System Clock Control Key (SCCRK)
See
for bit descriptions.
0x2F C384
PLL Low-Power and Reset Control Register Key (PLPRCRK)
See
for bit descriptions.
0x2F C388
Reset Status Register Key (RSRK)
See
for bit descriptions.
0x2F C38C–0x2F
C3FC
Reserved
1
16-bit register.
Table 5-1. USIU Address Map (continued)
Address
Register
Summary of Contents for MPC561
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Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
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Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
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