mcf5282 Freescale Semiconductor, Inc, mcf5282 Datasheet - Page 532

• Manufacturer Part Number: mcf5282
• Manufacturer: Freescale Semiconductor, Inc

Chip Configuration Module (CCM)
4
27.5.3
The following subsection describes the CCM registers.
27.5.3.1 Chip Configuration Register (CCR)
27-4
Accessing an unimplemented address has no effect and causes a cycle termination transfer error.
14–11
10–8
Bits
Address
15
7
6
5
Reset
Field LOAD
R/W
Register Descriptions
PSTEN
MODE
Name
Note: The reset value of the LOAD and MODE fields is determined during reset configuration. The SZEN is
set for master mode and cleared for all other configurations. The BME bit is set to enable the bus monitor and
all other bits in the register are cleared at reset.
LOAD
SZEN
—
—
15
To safeguard against unintentionally activating test logic, write 0x0000 to
the above reserved location during initialization (immediately after reset) to
lock out test features. Setting any bits in the CCR may lead to unpredictable
results.
14
Pad driver load. The LOAD bit selects full or partial drive strength for selected pad output drivers.
0 Default drive strength.
1 Full drive strength.
Table 27-2
Reserved, should be cleared.
Chip configuration mode. This read-only field reflects the chip configuration mode.
000-101 Reserved.
110 Single-chip mode.
111 Master mode.
Reserved, should be cleared.
SIZ[1:0] enable. This read/write bit enables the SIZ[1:0] function of the external pins.
0 SIZ[1:0] function disabled.
1 SIZ[1:0] function enabled.
PST[3:0]/DDATA[3:0] enable. This read/write bit enables the Processor Status (PST) and Debug
0 PST/DDATA function disabled.
1 PST/DDATA function enabled.
For maximum capacitive load, set the LOAD bit to select full drive strength. For reduced power
consumption and reduced electromagnetic interference (EMI), clear the LOAD bit to select partial
drive strength.
Data (DDATA)n functions of the external pins.
R/W
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
—
Figure 27-2. Chip Configuration Register (CCR)
shows the read/write accessibility of this write-once bit.
Table 27-4. CCR Field Descriptions
11
10
Read Only
MODE
IPSBAR + 0x11_0004
NOTE
See Note
8
Description
—
7
SZEN PSTEN
6
5
—
4
R/W
BME
3
Freescale Semiconductor
2
BMT
0