TS68C429A Просмотр технического описания (PDF) - Unspecified
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TS68C429A Datasheet PDF : 46 Pages
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TS68C429A
Table 7-5. Timing Characteristic (Continued)
Number
Symbol
Parameter
Min
5
tCLDKL
CLK-SYS low to DTACK low
-
6
tCLDOV
CLK-SYS low to data out valid
-
7
tDKLDOV
DTACK low to data out valid
-
8
tSHDKH
CS or LDS/UDS or IACKxx high to DTACK high
-
9
tSHDXZ
CS or LDS/UDS or IACKxx high to DTACK hi-z
-
10
tSHDOZ
CS or LDS/UDS or IACKxx high to data out hi-z
-
11
tILIOL
IEIxx or IACKxx low to IEOxx low
-
12
tIKHIOH
IACKxx high to IEOxx high
-
13
tIILDKL
IEIxx low to DTACK low
-
14
tIILDOV
IEIxx low to data out valid
-
15
tSH
CS, IACKxx, LDS/UDS inactive time
15
16
tDKLSH
DTACK low to CS or LDS/UDS or IACKxx high
0
17
tSHAH
CS or LDS/UDS high to address hold time
0
18
tSHRWI
CS or LDS/UDS high to R/W invalid
0
19
tDKLDIH
DTACK low to data in hold time
0
20
tSHDOH
CS or LDS/UDS or IACKxx high data out hold
time
0
Note: 1. T/G = Tested/Guaranteed.
Max
T/G(1)
Unit
45
T
ns
50
T
ns
10
G
ns
35
G
ns
50
G
ns
25
G
ns
35
T
ns
40
T
ns
40
T
ns
45
T
ns
-
T
ns
-
G
ns
-
G
ns
-
G
ns
-
G
ns
-
G
ns
8. Functional Description
8.1 Receiver Channel Unit (RCU)
8.1.1
Overview
The RCU is composed of 8 ARINC receiver channels and has per channel:
• a serial to parallel converter to translate the two serial signals in two 16-bit words.
• a memory to store the authorized labels,
• a control logic to check the validity of the received message.
• a buffer to keep the last valid received message.
8.1.2
Inputs
Each receiver channel has two input lines, receiving line high (RxiH) and receiving line low (RXiL) which
are not directly compatible with the bipolar modulated ARINC line. This ARINC three-level state signals
(“HIGH”, “NULL”, “LOW”) should be demultiplexed to generate the two RZ lines according to Figure 8-1.
14
0848E–HIREL–02/08
e2v semiconductors SAS 2008
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