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ST7SCR Datenblatt(PDF) 84 Page - STMicroelectronics

Teilenummer ST7SCR
Bauteilbeschribung  8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER
PDF  101 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7SCR Datenblatt(HTML) 84 Page - STMicroelectronics

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ST7SCR
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14.5 MEMORY CHARACTERISTICS
Subject to general operating conditions for VDD, fOSC, and TA unless otherwise specified.
14.5.1 RAM and Hardware Registers
Note 1: Minimum VDD supply voltage without losing data stored in RAM (in HALT mode or under RESET) or in hardware
registers (only in HALT mode). Not tested in production.
14.5.2 FLASH Memory
Operating Conditions: fCPU = 8 MHz.
Note:
1. Refer to the Flash Programming Reference Manual for the HDFlash typical programming and erase timing values.
Warning: Do not connect 12V to VPP before VDD is powered on, as this may damage the device.
Figure 42. Two typical Applications with VPP Pin
1)
14.6 SMARTCARD SUPPLY SUPERVISOR ELECTRICAL CHARACTERISTICS
(TA = 0... +70
oC, 4.0 < V
DD - VSS < 5.5V unless otherwise specified)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VRM
Data retention mode 1)
HALT mode (or RESET)
2
V
DUAL VOLTAGE FLASH MEMORY 1)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fCPU
Operating Frequency
Read mode
8
MHz
Write / Erase mode,
TA=25°C
8
VPP
Programming Voltage
4.0V
≤V
DD ≤ 5.5V
11.4
12.6
V
IPP
VPP Current
Write / Erase
30
mA
tVPP
Internal VPP Stabilization Time
10
µs
tRET
Data Retention
TA ≤ 55°C
40
years
NRW
Write Erase Cycles
TA=25°C
100
cycles
SMARTCARD SUPPLY SUPERVISOR
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
5V regulator output (for IEC7816-3 Class A Cards)
VCRDVCC
SmartCard Power Supply Voltage
4.6
5.0
5.4
V
ISC
SmartCard Supply Current
55
mA
IOVDET
Current Overload Detection
120 1)
mA
tIDET
Detection time on Current Overload
170 1)
1400 1)
µs
tOFF
VCRDVCC Turn off Time (see Figure
37)
CLOADmax ≤ 4.7uF
750
µs
VPP
ST72XXX
10k
Ω
PROGRAMMING
TOOL
VPP
ST72XXX



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