AT83EB5114 Atmel Corporation, AT83EB5114 Datasheet - Page 30

• Manufacturer Part Number: AT83EB5114
• Manufacturer: Atmel Corporation

Specifications of AT83EB5114

• Max. Operating Frequency: 24 MHz
• Cpu: 8051-12C
• Max I/o Pins: 11
• Adc Channels: 6
• Adc Resolution (bits): 10
• Adc Speed (ksps): 50
• Sram (kbytes): 0.25
• Eeprom (bytes): 256
• Operating Voltage (vcc): 3.0 to 3.6
• Timers: 4
• Mask Rom (kbytes): 4
• Watchdog: Yes

30
AT89/83EB5114
Table 15. TMOD Register
TMOD (S:89h)
Timer/Counter Mode Control Register.
Reset Value = 0000 0000b
Table 16. TH0 Register
TH0 (S:8Ch)
Timer 0 High Byte Register.
Reset Value = 0000 0000b
Number
Number
GATE1
Bit
Bit
7:0
7
7
7
6
5
4
3
2
1
0
Mnemonic Description
Mnemonic Description
C/T1#
GATE1
GATE0
C/T1#
C/T0#
M01
M10
M00
M11
Bit
Bit
6
6
Timer 1 Gating Control bit
Clear to enable Timer counter 1 whenever TR1 bit is set.
Set to enable Timer counter 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 Operating mode
Timer 0 Gating Control bit
Clear to enable Timer counter 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.
High Byte of Timer 0.
0
0
1
1
0
0
1
1
M11
0
1
0
0
1
0
1
5
5
Mode 0:
Mode 1:
Mode 2:
1
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).
Reloaded from TH0 at overflow
Mode 3:TL0 is an 8-bit Timer/Counter
M01
4
4
8-bit Timer/Counter (TH1) with 5-bit prescaler (TL1).
16-bit Timer/Counter.
8-bit auto-reload Timer/Counter (TL1). Reloaded from
TH1 at overflow.
Mode 3:Timer 1 halted. Retains count.
GATE0
3
3
C/T0#
2
2
M10
1
1
4311C–8051–02/08
M00
0
0