AT89LP428 Atmel Corporation, AT89LP428 Datasheet - Page 63

• Manufacturer Part Number: AT89LP428
• Manufacturer: Atmel Corporation

Specifications of AT89LP428

• Flash (kbytes): 4 Kbytes
• Max. Operating Frequency: 25 MHz
• Cpu: 8051-1C
• Max I/o Pins: 30
• Spi: 1
• Uart: 1
• Sram (kbytes): 0.75
• Eeprom (bytes): 512
• Self Program Memory: IAP
• Operating Voltage (vcc): 2.4 to 5.5
• Timers: 3
• Isp: SPI/OCD
• Watchdog: Yes

Table 13-1.
Table 13-2.
Note:
Table 13-3.
Note:
3654A–MICRO–8/09
T2CCA Address = 0D1H
Not Bit Addressable
Bit
Symbol
T2CCA
[1 - 0]
T2CCH Address = 0D2H
Not Bit Addressable
Bit
Symbol
T2CCD
[15 - 8]
T2CCC Address = 0D3H
Not Bit Addressable
Bit
Symbol
T2CCD
[7 - 0]
All writes/reads to/from T2CCH will access channel X as currently selected by T2CCA.The data registers for the remaining
unselected channels are not accessible.
All writes/reads to/from T2CCL will access channel X as currently selected by T2CCA.The data registers for the remaining
unselected channels are not accessible.
T2CCD.15
T2CCD.7
–
7
7
7
Function
Compare/Capture Address. Selects which CCA channel is currently accessible through the T2CCH, T2CCL and T2CCC
registers. Only one channel may be accessed at a time.
Function
Compare/Capture Data (High Byte). Reads from T2CCH will return the high byte from the CCA channel currently
selected by T2CCA. The high byte of the selected CCA channel will be updated with the contents of T2CCH when
T2CCL is written. When writing multiple channels with the same high byte, T2CCH need not be updated between writes
to T2CCL.
Function
Compare/Capture Data (Low Byte). Reads from T2CCL will return the low byte from the CCA channel currently selected
by T2CCA. Writes to T2CCL will update the selected CCA channel with the 16-bit contents of T2CCH and T2CCL.
T2CCA1
T2CCA – Timer/Counter 2 Compare/Capture Address
T2CCH – Timer/Counter 2 Compare/Capture Data High
T2CCL – Timer/Counter 2 Compare/Capture Data Low
0
0
1
1
T2CCD.14
T2CCD.6
T2CCA0
–
6
6
6
0
1
0
1
T2CCD.13
T2CCD.5
Channel
A – T2CCH, T2CCL and T2CCC access data and control for Channel A
B – T2CCH, T2CCL and T2CCC access data and control for Channel B
C – T2CCH, T2CCL and T2CCC access data and control for Channel C
D – T2CCH, T2CCL and T2CCC access data and control for Channel D
–
5
5
5
T2CCD.12
T2CCD.4
–
4
4
4
T2CCD.11
T2CCD.3
–
3
3
3
T2CCD.10
T2CCD.2
–
2
2
2
Reset Value = 0000 0000B
Reset Value = 0000 0000B
Reset Value = xxxx xx00B
T2CCA.1
T2CCD.9
T2CCD.1
AT89LP428/828
1
1
1
T2CCA.0
T2CCD.8
T2CCD.0
0
0
0
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