AT89C5132 Atmel Corporation, AT89C5132 Datasheet - Page 55

• Manufacturer Part Number: AT89C5132
• Manufacturer: Atmel Corporation

Specifications of AT89C5132

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-12C
• Max I/o Pins: 44
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Uart: 1
• Adc Channels: 2
• Adc Resolution (bits): 10
• Adc Speed (ksps): 22.7
• Sram (kbytes): 2.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 3.6
• Timers: 2
• Isp: UART/USB
• Watchdog: Yes

4173E–USB–09/07
Reset Value = 0000 0000b
Notes:
Table 42. TH0 Register
TH0 (S:8Ch) – Timer 0 High Byte Register
Reset Value = 0000 0000b
Number
Bit Number
Bit
7
6
5
4
3
2
1
0
7:0
7
-
1. Reloaded from TH1 at overflow.
2. Reloaded from TH0 at overflow.
Mnemonic
GATE1
GATE0
C/T1#
C/T0#
M01
M10
M00
M11
Mnemonic
Bit
Bit
6
-
Description
Timer 1 Gating Control Bit
Clear to enable Timer 1 whenever TR1 bit is set.
Set to enable Timer 1 only while INT1 pin is high and TR1 bit is set.
Timer 1 Counter/Timer Select Bit
Clear for Timer operation: Timer 1 counts the divided-down system clock.
Set for Counter operation: Timer 1 counts negative transitions on external pin T1.
Timer 1 Mode Select Bits
M11 M01
Timer 0 Gating Control Bit
Clear to enable Timer 0 whenever TR0 bit is set.
Set to enable Timer/Counter 0 only while INT0 pin is high and TR0 bit is set.
Timer 0 Counter/Timer Select Bit
Clear for Timer operation: Timer 0 counts the divided-down system clock.
Set for Counter operation: Timer 0 counts negative transitions on external pin T0.
Timer 0 Mode Select Bit
M10 M00
TH0 is an 8-bit Timer using Timer 1’s TR0 and TF0 Bits.
0
0
1
1
0
0
1
1
Description
High Byte of Timer 0
0
1
0
1
0
1
0
1
5
-
Operating mode
Mode 0: 8-bit Timer/Counter (TH1) with 5-bit prescaler (TL1).
Mode 1: 16-bit Timer/Counter.
Mode 2: 8-bit auto-reload Timer/Counter (TL1).
Mode 3: Timer 1 halted. Retains count.
Operating mode
Mode 0: 8-bit Timer/Counter (TH0) with 5-bit prescaler (TL0).
Mode 1: 16-bit Timer/Counter.
Mode 2: 8-bit auto-reload Timer/Counter (TL0).
Mode 3: TL0 is an 8-bit Timer/Counter.
4
-
3
-
2
-
(1)
(2)
AT89C5132
1
-
0
-
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