CDC3205G-C Micronas, CDC3205G-C Datasheet - Page 88

• Manufacturer Part Number: CDC3205G-C
• Description: Automotive Controller Family The Device is a Microcontroller For Use in Automotive Applications.the On-chip Cpu is an Arm Processor ARM7TDMI with 32-bit Data And Address Bus, Which Supports Thumb format Instructions.
• Manufacturer: Micronas

CDC 32xxG-C
10.1.3. Patch Operation
To activate a number of properly initialized patch cells for
ROM code patching, set all the corresponding PSELx bits in
registers PER and set bit PER.PMEN to 1 at last.
The Memory Patch Module will immediately start comparing
the current address to the setting of the enabled patch cells.
In case of a match the ROM data will be replaced by the cor-
responding patch cell data register setting.
If several PDRs have been initialized with different data but
same PAR contents, the patch result is unpredictable.
10.2. Registers
86
w
w
w
w
w
w
w
w
PAR
PDR
x
x
7
7
Patch Address Register
Patch Data Register
x
6
6
x
5
5
A7 to A2
0x00FFFFFF
0x00000000
D31 to D24
D23 to D16
x
4
4
A15 to A8
D15 to D8
D7 to D0
A22 to A16
x
3
3
x
2
2
x
x
1
1
June 12, 2003; 6251-579-1PD
x
x
0
0
3
2
1
0
Res
3
2
1
0
Res
Offs
Offs
Patched data can not be observed externally on the trace
bus because the Patch Module would deliver the gating sig-
nal too late for the logic to respond accordingly. Use the ETM
to trace instead.
10.1.4. Reconfiguration
To reconfigure the Memory Patch Module, first set
PER.PMEN to 0. The module will immediately terminate
patch operation.
Then proceed as described in 10.1.2. on page 85.
PSEL0 to 9
w1:
w0:
Before writing compare address or replace data of a patch
cell, only one cell must be selected. In compare mode one or
more patch cells can be selected.
PMEN
w1:
w0:
ICs which are derived from the Emulator IC may have less
patch cells. In these cases use always cells upwards from
cell 0.
w
w
w
w
PER
PSEL6
x
x
x
7
PSEL5
Patch Enable Register
x
x
x
6
Patch Cell Select
select cell for write or enabled for patch
de-select cell for write or disable for patch
Patch Mode Enable
enable patch mode of all cells
enable write mode of all cells
PSEL4
x
x
x
5
PSEL3
x
x
x
4
PRELIMINARY DATA SHEET
0x0000
PSEL2
x
x
x
3
PSEL9
PSEL1
x
x
2
PSEL8
PSEL0
x
x
1
Micronas
PSEL7
PMEN
x
x
0
Res
Offs