DS12887A Datasheet, PDF (13/19 Pages) Maxim Integrated Products – Real-Time Clock

DS5000(T)
AC CHARACTERISTICS (cont’d)
EXTERNAL CLOCK DRIVE
# PARAMETER
28 External Clock High Time
@12 MHz
@16 MHz
29 External Clock Low Time
30 External Clock Rise Time
31 External Clock Fall Time
@12 MHz
@16 MHz
@12 MHz
@16 MHz
@12 MHz
@16 MHz
SYMBOL
t_CLKHPW
t_CLKLPW
t_CLKR
t_CLKF
(t_A = 0°C to70°C; V_CC = 5V + 5%)
MIN
MAX
UNITS
20
ns
15
ns
20
ns
15
ns
20
ns
15
ns
20
ns
15
ns
AC CHARACTERISTICS (cont’d)
SERIAL PORT TIMING – MODE 0
# PARAMETER
35 Serial Port Cycle Time
36 Output Data Setup to Rising Clock Edge
37 Output Data Hold after Rising Clock Edge
38 Clock Rising Edge to Input Data Valid
39 Input Data Hold after Rising Clock Edge
SYMBOL
t_SPCLK
t_DOCH
t_CHDO
t_CHDV
t_CHDIV
(t_A = 0°C to70°C; V_CC = 5V + 5%)
MIN
MAX
UNITS
12t_CLK
µs
10t_CLK –133
ns
2t_CLK –117
ns
10t_CLK –133
ns
0
ns
SERIAL PORT TIMING – MODE 0
INSTRUCTION
0
1
2
3
4
5
6
7
8
ALE
CLOCK
35
36
DATA OUT
37
0
1
2
WRITE TO
SBUF REGISTER
INPUT DATA
39
38
CLEAR RI
VALID
VALID
VALID
3
4
VALID
VALID
5
6
7 SET TI
VALID
VALID
SET RI
021998 13/19