AT83C5134 Atmel Corporation, AT83C5134 Datasheet - Page 41

• Manufacturer Part Number: AT83C5134
• Manufacturer: Atmel Corporation

Specifications of AT83C5134

• Max. Operating Frequency: 32 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): 512
• Operating Voltage (vcc): 2.7 to 3.6
• Timers: 4
• Mask Rom (kbytes): 8
• Watchdog: Yes

Figure 13-2. PCA Interrupt System
7683C–USB–11/07
PCA Timer/Counter
Module 0
Module 1
Module 2
Module 3
Module 4
CMOD.0
Reset Value = 000X 0000b
Not bit addressable
The watchdog timer function is implemented in module 4 (See Figure 13-4).
The PCA interrupt system is shown in Figure 13-2.
PCA Modules: each one of the five compare/capture modules has six possible functions. It can
perform:
In addition, module 4 can be used as a Watchdog Timer.
Each module in the PCA has a special function register associated with it. These registers are:
CCAPM0 for module 0, CCAPM1 for module 1, etc. (see Table 13-3). The registers contain the
bits that control the mode that each module will operate in.
Number
• 16-bit capture, positive-edge triggered
• 16-bit capture, negative-edge triggered
• 16-bit capture, both positive and negative-edge triggered
• 16-bit Software Timer
• 16-bit High-speed Output
• 8-bit Pulse Width Modulator
Bit
1
0
ECF
Mnemonic
CCF1
CCF0
Bit
CF
ECCFn CCAPMn.0
Description
PCA Module 1 Interrupt Flag
Must be cleared by software.
Set by hardware when a match or capture occurs.
PCA Module 0 Interrupt Flag
Must be cleared by software.
Set by hardware when a match or capture occurs.
CR
CCF4 CCF3 CCF2 CCF1 CCF0
IE.6
EC
IE.7
EA
AT83C5134/35/36
priority decoder
CCON
0xD8
To Interrupt
41