參數(shù)資料
型號: SAA7146A
廠商: NXP Semiconductors N.V.
英文描述: Multimedia bridge, high performance Scaler and PCI circuit SPCI
中文描述: 多媒體橋梁,高性能潔牙機和PCI電路SPCI
文件頁數(shù): 123/144頁
文件大?。?/td> 645K
代理商: SAA7146A
1998 Apr 09
123
Philips Semiconductors
Product specification
Multimedia bridge, high performance
Scaler and PCI circuit (SPCI)
SAA7146A
Table 110
Status register (IICSTA); note 1
Note
1.
The error bits have to be cleared, before a new command can be executed. This may be needed twice after using
ABORT.
Table 111
Selection of I
2
C-bus bit rate; note 1
Notes
1.
Since the maximum width of spikes suppressed by the input filter depends on the PCI clock frequency, the
appropriate timing parameter of 50 ns from the I
2
C-bus specification is not fulfilled. Refer to the document for further
details. This document may be ordered using the code 9398 393 40011.
The selected bit rate is the maximum bit rate and could be ‘stretched’ (slowed down) by slaves.
2.
OFFSET
(HEX)
NAME
BIT
TYPE
DESCRIPTION
90
IICCC [2:0]
ABORT
SPERR
APERR
DTERR
DRERR
AL
ERR
BUSY
10 to 8
7
6
5
4
3
2
1
0
RW
RW
RW
RW
RW
RW
RW
R
R
clock bit rate selection; see Table 111
ABORT OPERATION: clears busy bit
bus error due to invalid start/stop condition
NACK: error in address phase
NACK: error in data transmission
NACK: error when receiving data
arbitration lost
general error flag: has to be reset by clearing all error flags
operation ongoing
IICCC2
IICCC1
IICCC0
BIT RATE
(2)
1
0
1
1
1
0
0
0
0
0
0
1
1
0
1
1
1
1
0
0
1
0
0
1
PCI clock/6400
PCI clock/3200
PCI clock/480
PCI clock/320
PCI clock/240
PCI clock/120
PCI clock/80
PCI clock/60
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