AT89C5131A-M Atmel Corporation, AT89C5131A-M Datasheet - Page 85

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

Specifications of AT89C5131A-M

• 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): 2.7 to 5.5
• Timers: 4
• Isp: UART/USB
• Watchdog: Yes

4337K–USB–04/08
Reset Value = X0XX X000b
Not bit addressable
Table 16-6.
IPL1 - Interrupt Priority Register (B2h)
Reset Value = X0XX X000b
Not bit addressable
Number
Bit
7
6
5
4
3
2
1
0
7
-
Mnemonic
IPL1 Register
PUSBL
PTWIL
PUSBL
PSPIL
PKBL
Bit
-
-
-
-
6
Description
Reserved
The value read from this bit is indeterminate. Do not set this bit.
USB Interrupt Priority bit
Refer to PUSBH for priority level.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
SPI Interrupt Priority bit
Refer to PSPIH for priority level.
TWI Interrupt Priority bit
Refer to PTWIH for priority level.
Keyboard Interrupt Priority bit
Refer to PKBH for priority level.
5
-
4
-
3
-
AT89C5130A/31A-M
PSPIL
2
PTWIL
1
PKBDL
0
85