MT9072AB datasheet(204/275 Pages) ZARLINK

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MT9072

Data Sheet

204

Zarlink Semiconductor Inc.

17.2.7

Interrupt Vector Mask and Interrupt Mask Registers (Y4X) Bit Functions

Tables 125 and 126 describe the bit functions of the Interrupt Vector Masks, while tables 186 to 189 describe the bit

functions of each of the Interrupt Mask Registers in the MT9072. Each interrupt mask register is repeated for each

of the 8 framers (not the Interrupt Vector Masks). Framer 0 is addressed with Y=0, Framer 1 with Y=1, Framer 2

with Y=2 and so on up to Framer 7 with Y=7 (where Y represents the 4 most significant address bits (MSB)

A11-A8). In addition, a simultaneous write to all 8 framers is possible by setting the MSB address to Y=8 (1000).

However, since the Interrupt Vector Masks are common to all eight framers, only addresses 902 and 903 may be

used to read from or write to these registers.

A (0), (1) or (#) in the “Name” column of these tables indicates the state of the data bits after a reset (RESET, RSTC

or RST). The (#) indicates that a (0) or (1) is possible.

2T2I

Timer 2 Interrupt. This bit is one when the corresponding latched status bit (T2L, register

address Y26) is set, and the corresponding mask bit is unmasked (T2M, register address Y46).

This bit is cleared when either this register, or the latched status register is read.

1T1I

Timer 1 Interrupt. This bit is one when the corresponding latched status bit (T1L, register

address Y26) is set, and the corresponding mask bit is unmasked (T1M, register address Y46).

This bit is cleared when either this register, or the latched status register is read.

ONESECI One Second Timer Status Interrupt. This bit is one when the corresponding latched status bit

(ONESECL, register address Y26) is set, and the corresponding mask bit is unmasked

(ONESECM, register address Y46). This bit is cleared when either this register, or the latched

status register is read.

Bit

Name

Functional Description

Table 180 - CAS, National, CRC-4 Local and Timer Interrupt Status Register (Address Y36) (E1)

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