AT89C5122D-RDRUM Atmel, AT89C5122D-RDRUM Datasheet - Page 151

• Manufacturer Part Number: AT89C5122D-RDRUM
• Description: IC 8051 MCU 32K CRAM USB 64-VQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C5122D-RDRUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: SmartCard, SPI, UART/USART, USB
• Peripherals: LED, POR, WDT
• Number Of I /o: 46
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• For Use With: AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCUAT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-03 - KIT STARTER FOR MCU AT8XC5122/23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Other names: AT89C5122D-RDRUMTR

Table 89. Timer/Counter Mode Control Register - TMOD (S:89h)
Reset Value = 0000 0000b
4202F–SCR–07/2008
Bit Number
GATE1
7
6
5
4
3
2
1
0
7
Bit Mnemonic
GATE1
GATE0
C/T1#
C/T0#
M11
M01
M10
M00
C/T1#
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
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
TH0 is an 8-bit Timer using Timer 1’s TR0 and TF0 bits.
0
0
1
1
M11
0
0
1
1
M11
5
M01
M00
0
1
0
1
0
1
0
1
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) reloaded from TH1 at overflow.
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). Reloaded from TH0 at overflow.
Mode 3:TL0 is an 8-bit Timer/Counter.
M01
4
GATE0
3
AT83R5122, AT8xC5122/23
C/T0#
2
M10
1
M00
0
151