MT9079 Mitel Semiconductor, MT9079 Datasheet - Page 20

• Manufacturer Part Number: MT9079
• Description: CMOS ST-BUS FAMILY Advanced Controller for E1
• Manufacturer: Mitel Semiconductor

MT9079
the interrupt vector is read it is automatically cleared
and IRQ will return to a high impedance state. In
ST-BUS mode, as well as processor and controller
modes, this function is accomplished by toggling the
INTA bit (page 1, address 1AH.)
All the interrupts of the MT9079 are maskable. This is
accomplished through interrupt mask words zero to
four, which are located on page 1, addresses 1BH to
1EH.
After a MT9079 reset (RESET pin or RST control bit)
all interrupts of mask words one, two and three are
masked; and the interrupts of mask word zero are
unmasked.
Interrupt Mask Word Zero
Control and Status Registers
4-256
Bit 7
SYNI
10H (Table 25)
11H (Table 26)
12H (Table 27)
13H (Table 28)
14H (Table 29)
15H (Table 30)
16H (Table 31)
17H (Table 32)
18H (Table 33)
19H (Table 34)
1AH (Table 35)
1BH (Table 36)
1CH (Table 37)
1DH (Table 38)
1EH (Table 39)
1FH
(A
4
Address
A
3
RAII
A
2
A
1
A
AISI
0
)
AIS16I LOSI
Multiframe, National Bit Buffer and Data
Link Selection
Mode Selection
Transmit Non-frame Alignment Signal
Transmit Multiframe Alignment Signal
ST-BUS Offset
Coding and Loopback Control Word
Transmit Alarm Control
Code Insert Word
Code Detect Word
Code Detect Bit Mask
Interrupt, Signalling and BERT Control
Word
Interrupt Mask Word Zero
Interrupt Mask Word One
Interrupt Mask Word Two
Interrupt Mask Word Three
Unused.
FERI
Table 8 - Master Control Words (Page 1)
Register
BPVO
Bit 0
SLPI
Interrupt Mask Word One
Interrupt Mask Word Two
Interrupt Mask Word Three
All interrupts may be suspended, without changing
the interrupt mask words, by making the SPND
control bit of page 1, address 1AH high.
MFSYI CSYNI RFALI
Bit 7
Bit 7
Bit 7
EBO
EBI
ASEL, MFSEL, NBTB & S
TIU1, TALM & TNU4-8
TAIS, TAIS0, TAIS16, TE, REFRM, 8KSEL,
RDLY, SPND, INTA,TxCAS, RPSIG & BFAS
SYNI, RAII, AISI, AIS16I, LOSI, FERI, BPVO
EBI, CRCI, CEFI, BPVI, RCRI, BERI & SIGI
EBO, CRCO, CALNI, FERO, RCRO, BERO &
---
TIU0, CRCM, RST, ARAI, AUTY, MODE,
CSYN & AUTC
TMA1-4, X1, Y, X2 & X3
SOFF7 - SOFF0
COD1-0, HDB3, MFRF, DLBK, RLBK, SLBK &
PLBK
CIWA & CDWA
CIW7 - CIW0
CDW7 - CDW0
DWM7 - DWM0
& SLPI
AUXPI
MFSYI, CSYNI, RFALI, YI, 1SEC, STOP,
STRT & DATA
CRCO CALNI FERO RCRO BERO AUXPI
CRCI
CEFI
BPVI
YI
Function
1SEC STOP STRT
RCRI
a4
- S
BERI
a8
---
DATA
Bit 0
Bit 0
Bit 0
SIGI
---