DSP56309EVM Freescale Semiconductor, DSP56309EVM Datasheet - Page 191

• Manufacturer Part Number: DSP56309EVM
• Description: KIT EVALUATION FOR XC56309
• Manufacturer: Freescale Semiconductor
• Type: DSPr

Specifications of DSP56309EVM

• Contents: Module Board, Installation Guide, Power Supply, Cable, Software and more
• Description/function: Audio DSPs
• Product: Audio Modules
• For Use With/related Products: DSP56309
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

configured as input. A hardware
bits.
8.7.3 Port E Data Register (PDRE)
Bits 2–0 of the read/write 24-bit PDRE writes data to or reads data from the associated SCI signal
lines when configured as GPIO signals. If a port signal PE[i] is configured as an input (GPI), the
corresponding PDRE[i] bit reflects the value present on the input signal line. If a port signal PE[i]
is configured as an output (GPO), a value written to the corresponding PDRE[i] bit is reflected as
a value on the output signal line. Either a hardware
instruction clears all PDR bits.
Freescale Semiconductor
Note:
Note:
23
11
23
11
For bits 2–0, a 0 configures PEn as a GPI and a 1 configures PEn as a GPO. For the SCI, the GPIO signals are
PE[2–0]. The corresponding direction bits for Port E GPIOs are PRRE[2–0].
For bits 2–0, the value represents the level that is written to or read from the associated signal line if enabled as a
GPIO signal by the PCRE bits. For SCI, the GPIO signals are PE[2–0]. The corresponding data bits are PDRE[2–0].
= Reserved. Read as zero. Write with zero for future compatibility.
= Reserved. Read as zero. Write with zero for future compatibility.
22
10
22
10
Figure 8-9. Port E Direction Register (PRRE X:$FFFF9E)
21
21
9
9
Figure 8-10. Port Data Registers (PDRE X:$FFFF9D)
20
20
8
8
RESET
DSP56309 User’s Manual, Rev. 1
19
19
7
7
signal or a software RESET instruction clears all PRRE
18
18
6
6
17
RESET
17
5
5
signal or a software RESET
16
16
4
4
15
15
3
3
PDRE2
PRRE2
GPIO Signals and Registers
14
14
2
2
PRRE1
PDRE1
13
13
1
1
PDRE0
PRRE0
12
12
0
0
8-23