AT89C5131A-L Atmel Corporation, AT89C5131A-L Datasheet - Page 60

• Manufacturer Part Number: AT89C5131A-L
• Manufacturer: Atmel Corporation

Specifications of AT89C5131A-L

• Flash (kbytes): 32 Kbytes
• Max. Operating Frequency: 48 MHz
• Cpu: 8051-12C
• Max I/o Pins: 34
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Sram (kbytes): 1.25
• Eeprom (bytes): 1024
• Self Program Memory: API
• Operating Voltage (vcc): 3.0 to 3.6
• Timers: 4
• Isp: UART/USB
• Watchdog: Yes

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AT89C5131A-L
Table 51. PCA Module Modes (CCAPMn Registers)
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 52 and
Table 53)
ECOMn
X
X
X
0
1
1
1
1
CAPPn
0
1
0
1
0
0
0
0
CAPNn
0
0
1
1
0
0
0
0
MATn
0
0
0
0
1
1
0
1
TOGn
0
0
0
0
0
1
0
X
PWM
m
0
0
0
0
0
0
1
0
ECCF
n
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
16-bit Software Timer/Compare
mode.
16-bit High Speed Output
8-bit PWM
Watchdog Timer (module 4
only)
No Operation
4338F–USB–08/07