at83c5122 ATMEL Corporation, at83c5122 Datasheet - Page 164

• Manufacturer Part Number: at83c5122
• Description: At83c5123 C51 Microcontroller With Usb And Smart Card Reader Interfaces
• Manufacturer: ATMEL Corporation

164
AT8xC5122/23
Table 100. Interrupt Enable Register 1 - IEN1 (B1h) for AT83C5123
Reset Value = X0XX 0XXXb (Bit addressable)
Table 101. Interrupt Priority Low Register 0 - IPL0 (B8h)
Reset Value = X000 0000b (Bit addressable)
Number
Number
5 - 4
Bit
7 - 5
Bit
7
7
6
3
2
1
0
7
4
3
2
1
0
-
-
Mnemonic
Mnemonic Description
EUSB
EUSB
PX1L
PX0L
ESCI
PT1L
PT0L
PSL
Bit
Bit
6
6
-
-
-
-
-
Reserved
The value read from this bit is indeterminate. Do not change these bits.
Serial port Priority bit
Refer to PSH for priority level.
Timer 1 overflow interrupt Priority bit
Refer to PT1H for priority level.
External interrupt 1 Priority bit
Refer to PX1H for priority level.
Timer 0 overflow interrupt Priority bit
Refer to PT0H for priority level.
External interrupt 0 Priority bit
Refer to PX0H for priority level.
Description
Reserved
The value read from this bit is indeterminate. Do not change this bit.
USB Interrupt Enable bit
Cleared to disable USB interrupt .
Set to enable USB interrupt.
Reserved
The value read from this bit is indeterminate. Do not change these bits.
SCI interrupt Enable bit
Cleared to disable SCIinterrupt .
Set to enable SCI interrupt.
Reserved
The value read from this bit is indeterminate. Do not change this bit.
Reserved
The value read from this bit is indeterminate. Do not change this bit.
Reserved
The value read from this bit is indeterminate. Do not change this bit.
5
5
-
-
PSL
4
4
-
ESCI
PT1L
3
3
PX1L
2
2
PT0L
1
1
-
4202E–SCR–06/06
PX0L
0
0