~ National ~ Semiconductor - Al Kossow's Bitsavers

4.0 Timing Waveforms (Continued)
Receiver Timing
RCCK
---1
n
L---.....J
n rL
L.....'I--I __
1---------ICLKs--------·II_1SCO
rL
SAMPLEClk
-------
(RECli~~~ \'"_S_TA_AT_C'- ___ O,~.T-A-"-TS-('---8)---
SAMPLE I I
CLK-L __ ~~_~ __ ~I~I~---L---~---L-~~---~~I~
--l l--.gNT
INTERRUPT fIr iL
(DATA
RCVRERRI
READY OR
_____________________ J ~
iiJj.RD
DA~:~F~:~
DRRDlSRl
(NOTE 2)
~'AI.T
________________________ ~ ____ _
TL/C/8401-7
z
rJ)
....
0)
....
U1
......
o
Z
rJ)
01)
N
U1
~ ......
Z
rJ)
....
0)
o ....
U1
......
o
Z
rJ)
01)
N
o
U1
~
Transmitter Timing
OUT~~~~AT~ \START/ OAlAIS-I) ~S~TA_A .. i'_ ________
INTERRUPT
_____ ~I·,AS~ ,.--------,\
--1 FY
Ir1STI ~
(THRE) --'"I I 1
r~~ ~ ~~- I
Wii.WA J\r--. SI Ir\
(WATHAI I, \\._______________ ~_;_-
(NOTE 1) I I
~"A -
(AOHAI 1iD,IID ____________________________, ~ '---
!NOT£2)
TL/C/8401-8
MODEM Controls Timing
t
Wfj,WR
fl'-'I
(WR MCR)
/
(NOTE 1)
- .. 00-'
ouW~ '\ !
rn.ll!if.ilCii ____ .JI
INTERAUPT -7--"1
Note 1: See Write Cycle Timing
Note 2: See Read Cycle Timing
\\. ______________ _
I, ~_~r-\I
1-'SlM- -1'A1Mr- 1-'SlM- -1'A1Mr- r'SlM---i
RD. 110 r-'V. f\J!
I~:o\'::: ---------1 \ I \\.__'-,_______
4-25
1'- -r
\ /,...---
TL/C/8401-9