System Configuration and Protection
MPC561/MPC563 Reference Manual, Rev. 1.2
Freescale Semiconductor
6-25
6.2.2.1.1
SIU Module Configuration Register (SIUMCR)
The SIUMCR contains bits which configure various features in the SIU module. The register contents are
shown below.
WARNING
All SIUMCR fields which are controlled by the reset configuration word
should not be changed by software while the corresponding functions are
active.
MSB
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Field EARB
EARP
—
DSHW
DBGC
—
ATWC
GPC
DLK
HRESET ID0
1
000_0000_0
ID[9:10]
1
ID11
1
ID12
1
000
Addr
0x2F C000
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
LSB
31
Field
—
SC
RCTX MLRC
—
MTSC
NOS
HOW
EICEN
LPMASK
_EN
BURST
_EN
—
HRESET
0
ID[17:18]
1
0_0000_0000_0000
1
The reset value is a reset configuration word value, extracted from the internal data bus line. Refer to
Reset Configuration Word (RCW)
Figure 6-12. SIU Module Configuration Register (SIUMCR)
Table 6-7. SIUMCR Bit Descriptions
Bits
Name
Description
0
EARB
External arbitration
0 Internal arbitration is performed
1 External arbitration is assumed
1:3
EARP
External arbitration request priority. This field defines the priority of an external master’s
arbitration request. This field is valid when EARB is cleared. Refer to
,” for details.
4:7
—
Reserved
8
DSHW
Data show cycles. This bit selects the show cycle mode to be applied to U-bus data cycles (data
cycles to IMB modules and Flash EEPROM). This field is locked by the DLK bit. Note that
instruction show cycles are programmed in the ICTRL and L-bus data show cycles are
programmed in the L2UMCR.
0 Disable show cycles for all internal data cycles
1 Show address and data of all internal data cycles
9:10
DBGC
Debug pins configuration. Refer to
.
11
DBPC
Reserved.
12
ATWC
Address write type enable configuration. This bit configures the pins to function as byte write
enables or address types for debugging purposes.
0 WE[0:3]/BE[0:3]/AT[0:3] functions as WE[0:3]/BE[0:3]
1
1 WE[0:3]/BE[0:3]/AT[0:3] functions as AT[0:3]
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...