Motorola ColdFire MCF5281 - Manual (Page 211)

Edge Port Module (EPORT)
Freescale Semiconductor 11-3
11.4 Memory Map and Registers
This subsection describes the memory map and register structure.
11.4.1 Memory Map
Refer to Table 11-2 for a description of the EPORT memory map. The EPORT has an IPSBAR offset for
base address of 0x0013_0000.
11.4.2 Registers
The EPORT programming model consists of these registers:
• The EPORT pin assignment register (EPPAR) controls the function of each pin individually.
• The EPORT data direction register (EPDDR) controls the direction of each one of the pins
individually.
• The EPORT interrupt enable register (EPIER) enables interrupt requests for each pin individually.
• The EPORT data register (EPDR) holds the data to be driven to the pins.
• The EPORT pin data register (EPPDR) reflects the current state of the pins.
• The EPORT flag register (EPFR) individually latches EPORT edge events.
11.4.2.1 EPORT Pin Assignment Register (EPPAR)
Table 11-2. Edge Port Module Memory Map
IPSBAR
Offset
Bits 15–8 Bits 7–0 Access
1
1
S = CPU supervisor mode access only. S/U = CPU supervisor or user mode access. User mode accesses to
supervisor only addresses have no effect and result in a cycle termination transfer error.
0x0013_0000 EPORT Pin Assignment Register (EPPAR) S
0x0013_0002 EPORT Data Direction Register (EPDDR) EPORT Interrupt Enable Register (EPIER) S
0x0013_0004 EPORT Data Register (EPDR) EPORT Pin Data Register (EPPDR) S/U
0x0013_0006 EPORT Flag Register (EPFR) Reserved 2
2
Writing to reserved address locations has no effect, and reading returns 0s.
S/U
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Field EPPA7 EPPA6 EPPA5 EPPA4 EPPA3 EPPA2 EPPA1 —
Reset 0000_0000_0000_0000
R/W R/W R
Address IPSBAR + 0x0013_0000, 0x0013_0001
Figure 11-2. EPORT Pin Assignment Register (EPPAR)
MCF5282 and MCF5216 ColdFire Microcontroller User’s Manual, Rev. 3