MT92220BG Zarlink Semiconductor, MT92220BG Datasheet - Page 22

• Manufacturer Part Number: MT92220BG
• Description: Description = 1023 Channel Voice Over IP/AAL2 Processor ;; Package Type = Epbga ;; No. Of Pins = 608
• Manufacturer: Zarlink Semiconductor

22
extended_data
extended_a[32:20]
Reserved
read_burst_length
Reserved
access_req
extended_a[3:1]
write_enable
extended_parity
Field
Field
Field
15:0 RW
Bit
6:0
7
8
11:9
13:12
15:14
Bit
12:0
15:13
Type Reset
Bit
RW
RO
PC
RW
RW
RW
Type
0000h The 16 bits of data used in an extended indirect access to the chip. For
RW
RO
Type
Table 4 - Read/Write Data Register (004h)
Table 5 - Address High Register (008h)
Table 3 - Control Register (000h)
01h
0
0
000
00
00
Reset
0000h Extended address bits 32:20. extended_a[32:0] points to bytes.
000
all extended direct accesses, this field is not used. During write
accesses, the write data is written here by the external CPU. During read
accesses, read data returns here to be read.
Reset
Zarlink Semiconductor Inc.
Number of words to prefetch when any read is executed. 00h =
128; 01h= 1; 02h = 2, etc. The higher this number, the longer the
first read in a sequential series of reads will take; all successive
accesses will be very quick and the overall read performance
will be much better. This field should be set to 1 for individual
(non-sequential) reads. Any read burst that crosses a 256 byte
boundary will be broken up into two bursts.
Set by software when an extended access to the device must be
started. Cleared by hardware when the access is completed.
Used for extended indirect accesses only.
Extended address bits 3:1. extended_a[32:0] points to bytes.
Used for extended indirect accesses only.
Active high write enables. “00” = read access (indirect only);
“01” = write to lower byte; “10”=write to upper byte; “11”=write to
entire word. Used both in extended indirect and extended direct
write accesses. For all extended direct read accesses, this field
has no effect. For all byte wide extended direct accesses, this
field has no effect.
Parity bits used for both reads and writes. Used both in
extended indirect and extended direct accesses.
Used both for extended indirect and extended direct accesses.
Description
Description
Description