Rainbow Electronics AT76C551 - Manual (Page 71)

71
AT76C551
1612D–08/01
Interrupt Mask Register
addr: F00004 hex R/W 8 bits
• Bit 7 – VC Mask
Enables the Voice Codec interrupt
• Bit 6 – PCMCIA Mask
Enables the PCMCIA interrupt
• Bit 5 – UART Mask
Enables the UART interrupt
• Bit 4 – USB Mask
Enables the USB interrupt
• Bit 3 – BDPR Mask
Enables the Baseband DPRAM interrupt
• Bit 2 – BT Mask
Enables the Baseband and Timers interrupt
• Bit 1 – TM1 Mask
Enables the Timer 1 Interrupt
• Bit 0 – TM2 Mask
Enables the Timer 2 Interrupt
Note: Default Value: 00 hex
Interrupt Masked Status Register
addr: F00008 hex R 8 bits
• Bits 7..0 – US_ISM[7:0]
Each bit of this register is the boolean and of the corresponding bits of Interrupt Status register
and the Interrupt Mask Register.
Note: Default Value: 00 hex
Interrupt Priority Register
addr: F0000C hex R/W 8 bits
• Bit 7 – VC_PR
Enables FIQ priority for the Voice Codec interrupt line
• Bit 6 – PCMCIA_PR
Enables FIQ priority for PCMCIA interrupt line
• Bit 5 – UART_PR
Enables FIQ priority for UART interrupt line
• Bit 4 – USB _PR
Enables FIQ priority for USB interrupt line
• Bit 3 – BDPR_PR
Enables FIQ priority for DPRAM interrupt line
• Bit 2 – BT_PR
Enables FIQ priority for Baseband interrupt line