ds2252t Maxim Integrated Products, Inc., ds2252t Datasheet - Page 14

• Manufacturer Part Number: ds2252t
• Description: Ds2252t Secure Microcontroller Module
• Manufacturer: Maxim Integrated Products, Inc.

AC CHARACTERISTICS—SERIAL PORT TIMING: MODE 0
(V
SERIAL PORT TIMING: MODE 0
NOTES:
1. All voltage referenced to ground.
2. SDI should be taken to a logic high when V
3. SDI is deglitched to prevent accidental destruction. The pulse must be longer than t
4. Maximum operating I
5. Idle mode I
6. Stop mode I
7. Pin capacitance is measured with a test frequency—1 MHz, T
8. Crystal startup time is the time required to get the mass of the crystal into vibrational motion from the
35
36
37
38
39
#
CC
deglitcher, but SDI is not guaranteed unless it is longer than t
t
ns, V
connected; RST = XTAL1 = V
time that power is first applied to the circuit until the first clock pulse is produced by the on-chip
oscillator. The user should check with the crystal vendor for a worst-case specification on this time.
CLKF
= 5V ±10%, T
PARAMETER
Serial Port Clock Cycle Time
Output Data Setup to Rising Clock Edge
Output Data Hold after Rising Clock Edge
Clock Rising Edge to Input Data Valid
Input Data Hold after Rising Clock Edge
=10 ns, V
IL
= 0.5V; XTAL2 disconnected; PORT0 = V
IDLE
STOP
IL
is measured with all output pins disconnected; XTAL1 driven with t
= 0.5V; XTAL2 disconnected; RST = PORT0 = V
is measured with all output pins disconnected; PORT0 = V
A
= 0°C to +70°C.)
CC
is measured with all output pins disconnected; XTAL1 driven with t
SS
.
CC
14 of 16
= +5V, and to approximately 3V when V
SYMBOL
CC
t
t
t
t
t
CHDIV
SPCLK
DOCH
CHDO
CHDV
, RST = V
SPA
A
10t
2t
SS
= +25°C.
.
CLK
.
12t
CLK
MIN
CC
0
CLK
- 117
- 133
.
10t
MAX
CLK
- 133
CC
CLKR
SPR
CC
; XTAL2 not
< 3V.
, t
to pass the
CLKF
UNITS
µs
ns
ns
ns
ns
CLKR
= 10
,