AT80C51RD2-SLSIM Atmel, AT80C51RD2-SLSIM Datasheet - Page 28

• Manufacturer Part Number: AT80C51RD2-SLSIM
• Description: IC MCU 8051 5V SPI 20MHZ 44-PLCC
• Manufacturer: Atmel
• Series: 80Cr

Specifications of AT80C51RD2-SLSIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Type: ROMless
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

28
AT80C51RD2
Table 10-4.
There are two additional registers associated with each of the PCA modules. They are CCAPnH
and CCAPnL and these are the registers that store the 16-bit count when a capture occurs or a
compare should occur. When a module is used in the PWM mode these registers are used to
control the duty cycle of the output (see Table 10-5 and Table 10-6).
Table 10-5.
CCAP0H - PCA Module 0 Compare/Capture Control Register High (0FAh)
CCAP1H - PCA Module 1 Compare/Capture Control Register High (0FBh)
CCAP2H - PCA Module 2 Compare/Capture Control Register High (0FCh)
CCAP3H - PCA Module 3 Compare/Capture Control Register High (0FDh)
CCAP4H - PCA Module 4 Compare/Capture Control Register High (0FEh)
Reset Value = 0000 0000b
Not bit addressable
ECOMn
Number
0
X
X
X
1
1
1
1
7-0
Bit
7
-
CAPPn
0
1
0
1
0
0
0
0
Mnemonic
PCA Module Modes (CCAPMn Registers)
CCAPnH Registers (n = 0-4)
Bit
6
-
-
CAPNn
0
0
1
1
0
0
0
0
Description
PCA Module n Compare/Capture Control
CCAPnH Value
MATn
5
-
0
0
0
0
1
1
0
1
TOGn
X
0
0
0
0
0
1
0
4
-
PWMm
0
0
0
0
0
0
1
0
3
-
ECCFn
0
X
X
X
X
X
0
X
Module Function
16-bit capture by a positive-edge
trigger on CEXn
16-bit capture by a negative trigger on
CEXn
16-bit capture by a transition on CEXn
No Operation
16-bit Software Timer/Compare mode.
16-bit High-speed Output
8-bit PWM
Watchdog Timer (module 4 only)
2
-
1
-
4113D–8051–01/09
0
-