Owner manual

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