AT89C51AC3-RLTIM Atmel, AT89C51AC3-RLTIM Datasheet - Page 67
AT89C51AC3-RLTIM
Manufacturer Part Number
AT89C51AC3-RLTIM
Description
IC 8051 MCU FLASH 64K 44VQFP
Manufacturer
Atmel
Series
89Cr
Datasheet
1.AT89C51AC3-RLTUM.pdf
(140 pages)
Specifications of AT89C51AC3-RLTIM
Core Processor
8051
Core Size
8-Bit
Speed
60MHz
Connectivity
UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
36
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Eeprom Size
2K x 8
Ram Size
2.25K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Mode 0 (13-bit Timer)
Figure 35. Timer/Counter x (x = 0 or 1) in Mode 0
Mode 1 (16-bit Timer)
Figure 36. Timer/Counter x (x = 0 or 1) in Mode 1
4383D–8051–02/08
INTx#
See the “Clock” section
INTx#
See the “Clock” section
CLOCK
CLOCK
FTx
Tx
FTx
Tx
TMOD reg
GATEx
TMOD reg
GATEx
÷ 6
÷ 6
TMOD reg
TMOD reg
C/Tx#
C/Tx#
Mode 0 configures Timer 0 as an 13-bit Timer which is set up as an 8-bit Timer (TH0
register) with a modulo 32 prescaler implemented with the lower five bits of TL0 register
(see Figure 35). The upper three bits of TL0 register are indeterminate and should be
ignored. Prescaler overflow increments TH0 register.
Mode 1 configures Timer 0 as a 16-bit Timer with TH0 and TL0 registers connected in
cascade (see Figure 36). The selected input increments TL0 register.
0
1
0
1
TCON reg
TCON reg
TRx
TRx
(8 bits)
(8 bits)
THx
THx
(8 bits)
(5 bits)
TLx
TLx
Overflow
Overflow
TCON reg
TCON reg
TFx
TFx
Timer x
Interrupt
Request
Timer x
Interrupt
Request
67
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