Freescale Semiconductor MPC5553 - Page 188

System Interface Unit (SIU)
MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor 6-9
6.3.1.1 MCU ID Register (SIU_MIDR)
The SIU_MIDR contains the part identification number and mask revision number specific to the device.
The part number is a read-only field that is mask programmed with the part number of the device. The part
number is changed if a new module is added to the device or a memory size is changed, for example. It is
not changed for bug fixes or process changes. The mask number is a read-only field that is mask
programmed with the specific mask revision level of the device. The current value applies to revision 0
and will be updated for each mask revision.
The MCU ID register is 32-bits. Figure 6-2 shows the MPC5553 MCU ID register values.
Figure 6-3 shows the MPC5554 MCU ID register values.
Address: Base + 0x0004 Access: Read only [0:15]
0123456789101112131415
RPARTNUM
W
Reset pin value0000000001010011
Address: Base + 0x0004 Access: Read only [ 24:31]
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R
0
0000000 MASKNUM_MAJOR MASKNUM_MINOR
W
Reset pin value0000000000000000
Figure 6-2. MPC5553 MCU ID Register (SIU_MIDR)
Address: Base + 0x0004 Access: Read only [0:15]
0123456789101112131415
R PARTNUM
W
Reset 416 default0000000000000000
Reset 416 pin CSP
1
1
The 416 CSP refers to the reset values for 496 pin assembly.
0000000000000000
Address: Base + 0x0004 Access: Read only [24:31]
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
R
0
0000000 MASKNUM_MAJOR MASKNUM_MINOR
W
Reset 416 default0000000000000000
Reset 416 pin CSP
1
0000000000000000
Figure 6-3. MPC5554 MCU ID Register (SIU_MIDR)