mtc20136pq STMicroelectronics, mtc20136pq Datasheet - Page 17

• Manufacturer Part Number: mtc20136pq
• Description: Adsl Transceiver Controller
• Manufacturer: STMicroelectronics

The Ctrl-E physical interface between the mailbox and an external controller can be used in one of two
modes: as a dedicated serial bus interface or as a generic parallel bus interface. Selection between serial
and parallel mode is done with an external mode strap, IO pins are shared.
Ctrl-E Mailbox
The Ctrl-E Mailbox occupies a 512 byte memory map accessible by the Ctrl-E physical interface and by
the ASB bus. The mailbox memory map is given in Table 4.
An external interrupt can be generated by the Mailbox interrupt controller.
A full description of the CTRLE protocol and use of the CTRLE mailbox is available in the “CTRLE Inter-
face Specifications” documents, available separately.
Table 4. Ctrl-E controller memory map:
TxCommand
RxCommand
TxComAv
RxComAv
Semaphore
CtrleDataBuffer
Field
Acc
RW
RW
RW
RW
RW
PV
Address MA[8:0]
005
Mailbox
000
001
002
003
004
h
-1FF
h
h
h
h
h
h
Size(bit)
8
8
1
1
2
8
Initial
00
00
00
00
0
0
b
b
h
h
b
h
Command written by Ctrl-E, read by
ASB
Command written by ASB, read by
Ctrl-E
1-bit register : 1 if TX command
available
1-bit register : 1 if RX command
available
Semaphore for access to written by
ASB, read by Ctrl-E
507x8 bit data buffer
Function
MTC20136
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