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ST7260 Datasheet(PDF) 90 Page - STMicroelectronics

Part # ST7260
Description  LOW SPEED USB 8-BIT MCU FAMILY WITH UP TO 8K FLASH/ROM AND SERIAL COMMUNICATION INTERFACE (SCI)
PDF  117 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7260 Datasheet(HTML) 90 Page - STMicroelectronics

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13.5 CLOCK AND TIMING CHARACTERISTICS
Subject to general operating conditions for VDD, fCPU, and TA.
13.5.1 General Timings
Notes:
1. Data based on typical application software.
2. Time measured between interrupt event and interrupt vector fetch.
∆t
c(INST) is the number of tCPU cycles needed to finish
the current instruction execution.
13.5.2 CONTROL TIMING CHARACTERISTICS
Note:
1. Not tested in production, guaranteed by characterization.
Symbol
Parameter
Conditions
Min
Typ 1)
Max
Unit
tc(INST)
Instruction cycle time
fCPU=8MHz
23
12
tCPU
250
375
1500
ns
tv(IT)
Interrupt reaction time 2)
tv(IT) = ∆tc(INST) + 10 tCPU
fCPU=8MHz
10
22
tCPU
1.25
2.75
µs
CONTROL TIMINGS
Symbol
Parameter
Conditions
Value
Unit
Min
Typ.
Max
fOSC
Oscillator Frequency
24
MHz
fCPU
Operating Frequency
8
MHz
tRL
External RESET
Input pulse Width
2520
ns
tPORL
Internal Power Reset Duration
4096
tCPU
TDOGL
Watchdog or Low Voltage Reset
Output Pulse Width
200
300
ns
tDOG
Watchdog Time-out
fcpu = 8MHz
49152
6.144
3145728
393.216
tCPU
ms
tOXOV
Crystal Oscillator
Start-up Time
201)
30
401)
ms
tDDR
Power up rise time
from VDD = 0 to 4V
1001)
ms



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