Rainbow Electronics DS2180A - Manual (Page 31)

DS2180A
041995 31/36
AC ELECTRICAL CHARACTERISTICS (0 ° C to 70 ° C; V
DD
= 5V + 10%)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
SDI to SCLK Setup t
DC
50 ns
SCLK to SDI Hold t
CDH
50 ns
SDI to SCLK Falling Edge t
CD
50 ns
SCLK Low Time t
CL
250 ns
SCLK High Time t
CH
250 ns
SCLK Rise & Fall Time t
R
, t
F
500 ns
CS to SCLK Setup t
CC
50 ns
SCLK to CS Hold t
CCH
50 ns
CS Inactive Time t
CWH
250 ns
SCLK to SDO Valid 2 t
CDV
200 ns
CS to SDO High Z t
CDZ
75 ns
SCLK Setup to CS Falling t
SCC
50 ns
NOTES:
1. Measured at V
IH
=2.0 V; V
IL
=.8 V and 10 ns maximum rise and fall time.
2. Output load capacitance = 100 pF.
SERIAL PORT WRITE AC TIMING DIAGRAM
t CC
ЗЗ
ЗЗ
SCLK
CS
t SCC t CH t F t R
ЙЙЙ ЙЙЙ ЙЙ
ЙЙ
ЙЙ
ЙЙ
ЙЙ
ЙЙЙ
ЙЙЙ
ЙЙЙЙ
ЙЙЙЙ
t
CWH
t
CCH
MSB LSB 1
LSB
t
DC
t
CDH
t CL t CD
t
CDH
CONTROL BYTE DATA BYTE
SDI
NOTES:
1. Data byte bits must be valid across low clock periods to prevent transients in operating modes.
2. Shaded regions indicate ”don’t care” states of input data.