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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST7SCR 데이터시트(PDF) 84 Page - STMicroelectronics |
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ST7SCR 데이터시트(HTML) 84 Page - STMicroelectronics |
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84 / 101 page  ST7SCR 84/101 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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