MT90870 Zarlink Semiconductor, Inc., MT90870 Datasheet - Page 44

• Manufacturer Part Number: MT90870
• Description: Flexible 12k Digital Switch (F12kDX)
• Manufacturer: Zarlink Semiconductor, Inc.

MT90870
13.2
Address 0001h.
The block programming register stores the bit patterns to be loaded into the connection memories when the
Memory Block Programming feature is enabled. The BPE, LBPD2-0 and BBPD2-0 bits in the BPR register must
be defined in the same write operation.
The BPE bit is set HIGH, to commence the block programming operation. Programming is completed in one frame
period and may be be instigated at any time within a frame.The BPE bit returns to LOW to indicate the block
programming function has completed.
When BPE is HIGH, no other bits of the BPR register must be changed for at least a single frame period, except to
abort the programming operation. The programming operation may be aborted by setting either BPE to LOW, or
the Control Register bit, MBP, to LOW.
The BPR register is configured as follows.
44
15-7
6-4
3-1
Bit
0
BBPD(2:0)
LBPD(2:0)
Unused
Block Programming Register (BPR)
Name
BPE
Reset
0
0
0
0
Table 17 - Block Programming Register Bits
Set LOW.
Backplane Block Programming Data.
These bits refer to the value loaded into the Backplane Connection Memory
(BCM) when the Memory Block Programming feature is activated. When the
MBP bit in the Control Register (CR) is set HIGH and the BPE is set HIGH, the
contents of Bits BBPD2-0 are loaded into Bits 15-13, respectively, of the BCM.
Bits 12-0 of the BCM are set LOW
Local block Programming Data.
These bits refer to the value loaded into the Local Connection Memory (LCM),
when the Memory Block Programming feature is activated. When the MBP bit in
the Control Register is set HIGH and the BPE is set HIGH, the contents of Bits
LBPD2-0 are loaded into Bits 15-13, respectively, of the LCM.
Bits 12-0 of the LCM are set LOW
Block Programming Enable.
A LOW to HIGH transition of this bit enables the Memory Block Programming
function. A LOW will be returned after 125us, upon completion of programming.
Set LOW to abort the programming operation.
Description
Preliminary Information
.