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.)
Interrupt Mask Word One
Bit 7
Bit 0
EBI
CRCI CEFI BPVI RCRI BERI
---
SIGI
Interrupt Mask Word Two
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.
Bit 7
Bit 0
EBO CRCO CALNI FERO RCRO BERO AUXPI
---
Interrupt Mask Word Three
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.
Bit 7
Bit 0
MFSYI CSYNI RFALI
YI
1SEC STOP STRT DATA
All interrupts may be suspended, without changing
the interrupt mask words, by making the SPND
control bit of page 1, address 1AH high.
Interrupt Mask Word Zero
Bit 7
Bit 0
SYNI
RAII
AISI AIS16I LOSI FERI BPVO SLPI
Control and Status Registers
Address
(A4A3A2A1A0)
Register
Function
10H (Table 25)
11H (Table 26)
Multiframe, National Bit Buffer and Data
Link Selection
ASEL, MFSEL, NBTB & S - S
a4 a8
Mode Selection
TIU0, CRCM, RST, ARAI, AUTY, MODE,
CSYN & AUTC
12H (Table 27)
13H (Table 28)
14H (Table 29)
15H (Table 30)
Transmit Non-frame Alignment Signal
Transmit Multiframe Alignment Signal
ST-BUS Offset
TIU1, TALM & TNU4-8
TMA1-4, X1, Y, X2 & X3
SOFF7 - SOFF0
Coding and Loopback Control Word
COD1-0, HDB3, MFRF, DLBK, RLBK, SLBK &
PLBK
16H (Table 31)
Transmit Alarm Control
TAIS, TAIS0, TAIS16, TE, REFRM, 8KSEL,
CIWA & CDWA
17H (Table 32)
18H (Table 33)
19H (Table 34)
1AH (Table 35)
Code Insert Word
Code Detect Word
Code Detect Bit Mask
CIW7 - CIW0
CDW7 - CDW0
DWM7 - DWM0
Interrupt, Signalling and BERT Control
Word
RDLY, SPND, INTA,TxCAS, RPSIG & BFAS
1BH (Table 36)
Interrupt Mask Word Zero
SYNI, RAII, AISI, AIS16I, LOSI, FERI, BPVO
& SLPI
1CH (Table 37)
1DH (Table 38)
Interrupt Mask Word One
Interrupt Mask Word Two
EBI, CRCI, CEFI, BPVI, RCRI, BERI & SIGI
EBO, CRCO, CALNI, FERO, RCRO, BERO &
AUXPI
1EH (Table 39)
1FH
Interrupt Mask Word Three
Unused.
MFSYI, CSYNI, RFALI, YI, 1SEC, STOP,
STRT & DATA
---
Table 8 - Master Control Words (Page 1)
4-256
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