mcf5282 Freescale Semiconductor, Inc, mcf5282 Datasheet - Page 516

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

General Purpose I/O Module
26.3.2.5 Port B/C/D Pin Assignment Register (PBCDPAR)
The PBCDPAR controls the pin function of ports B, C, and D.
The PBCDPAR register is read/write.
26-16
1
Address
Reset state determined during reset configuration as shown in
Reset See Note 1
R/W:
Field
Bits
5–0
7
6
PBPA
R/W
7
1
Figure 26-19. Port B/C/D Pin Assignment Register (PBCDPAR)
Single chip mode
Note if the port size of the external boot device is less than the port size
of the external SDRAM, the PBCDPAR register must be written after reset
to enable the primary function(s) on ports B,C, and D, before any SDRAM
accesses are attempted.
1
Master mode
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3
Operation
See Note 1
Mode of
PCDPA
PCDPA
Name
PBPA
R/W
—
6
Table 26-8. Reset Values for PBCDPAR Bits
Table 26-7. PBCDPAR Field Descriptions
Port B pin assignment. Configures the port B pins for their primary
function (D[23:16]) or digital I/O.
1 Port B pins configured for primary function (D[23:16])
0 Port B pins configured for digital I/O
Ports C,D pin assignment. Configures the port C and D pins for their
primary functions (D[15:8], D[7:0]) or digital I/O.
1 Port C,D pins configured for primary function (D[15:8], D[7:0])
0 Port C,D pins configured for digital I/O
Reserved, should be cleared.
External Boot
Port Size of
5
Device
16-bit
32-bit
8-bit
N/A
IPSBAR + 0x10_0050
1
PBPA Reset
Value
0
1
1
0
Table
Description
00_0000
26-8.
—
R
PCDPA Reset
Value
0
0
1
0
Freescale Semiconductor
0