20-668-0024 Rabbit Semiconductor, 20-668-0024 Datasheet - Page 110

• Manufacturer Part Number: 20-668-0024
• Description: IC CPU RABBIT4000 128-LQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 20-668-0024

• Processor Type: Rabbit 4000 8-bit
• Speed: 60MHz
• Voltage: 2.5V, 2.7V, 3V, 3.3V
• Mounting Type: Surface Mount
• Package / Case: 128-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Other names: 20-668-0022; 316-1078

12.1.2 Registers
12.2 Dependencies
12.2.1 I/O Pins
Parallel Port E uses the pins PE0 through PE7. These pins can be used individually as data
inputs or outputs; as serial port transmit and receive for Serial Ports E and F; as clocks for
Serial Ports C–F; as external I/O strobes; as outputs for the PWM and Timer C peripher-
als; as the upper address bits A[23:20]; or as the Ethernet clock and status LEDs for the
on-chip network peripheral. The input capture peripheral can also watch pins PE7, PE5,
PE3, and PE1. There is also an option to provide the slave port chip select on PE7.
All pins are set as inputs on startup.
The individual bits can be set to be open-drain via PEDCR.
See the associated peripheral chapters for details on how they use Parallel Port E.
12.2.2 Clocks
All outputs on Parallel Port E are clocked by the peripheral clock unless changed in PECR,
where the option of updating the Parallel Port E pins can be synchronized to the output of
Timer A1, Timer B1, or Timer B2.
100
Port E Data Register
Port E Alternate Low Register
Port E Alternate High Register
Port E Control Register
Port E Function Register
Port E Drive Control Register
Port E Data Direction Register
Port E Bit 0 Register
Port E Bit 1 Register
Port E Bit 2 Register
Port E Bit 3 Register
Port E Bit 4 Register
Port E Bit 5 Register
Port E Bit 6 Register
Port E Bit 7 Register
Register Name
Mnemonic
PEAHR
PEDDR
PEALR
PEDCR
PEB0R
PEB1R
PEB2R
PEB3R
PEB4R
PEB5R
PEB6R
PEB7R
PEDR
PECR
PEFR
Rabbit 4000 Microprocessor User’s Manual
I/O Address
0x007A
0x007B
0x007C
0x007D
0x007E
0x007F
0x0070
0x0072
0x0073
0x0074
0x0075
0x0076
0x0077
0x0078
0x0079
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
W
W
W
W
W
W
W
W
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00000000
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00000000
00000000
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00000000
Reset