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ES51918 датащи(PDF) 4 Page - Cyrustek corporation |
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ES51918 датащи(HTML) 4 Page - Cyrustek corporation |
4 / 32 page v1.08 06/04/03 4 ES51918 11,000 Counts Auto DMM 44 SLEEP O Sleep mode indicator, asserts low in SLEEP mode. 45 FREQ I Frequency counter input, offset V-/2 internally by the chip. 46 RS232 I Assert low to enable serial data output. 47 OHMC2 O Filter capacitor connection for resistance mode. 48 OHMC3 O Filter capacitor connection for resistance mode. 49 - 66 SEG18 – SEG01 O LCD segment line 01 – 18 67 BP4 O LCD backplane 4 68 BP3 O LCD backplane 3 69 BP2 O LCD backplane 2 70 BP1 O LCD backplane 1 71 ANNUNC O Square wave output at the backplane frequency, synchronized to BP1. ANNUNC can be used to control display annunciator. Connect a LCD segment to ANNUNC to turn it on; connect an LCD segment to its backplane to turn it off. 72 BUZIN I Pull to V- to enable the BUZOUT. 73 BUZOUT O Outputs a 2KHz audio frequency signal for driving piezoelectric buzze when BUZIN is low. 74 BKOUT O If BKLIT function is enabled, this pin will change from –3V to +3V For 60 sec, once press BKLIT pin again within 60 sec, this pin will Change back to –3V. 75 MAXMIN I Pulse to V- to enable MAX/MIN function. 76 VAHZ I Pulse to V- to enable VAHZ mode. 77 PEAK I Pulse to V- to enable Peak Hold mode. 78 REL_ZERO I Pulse to V- to enable Relative function or Zero function. 79 HOLD I Pulse to V- to enable HOLD function. 80 RANGE I Pulse to V- to enable manual mode and manual range selection. 81 OSC1 I Crystal oscillator input connection 82 OSC2 O Crystal oscillator output connection 83 APOSEL I Idle time selection for auto power off feature. 84 CESEL I CE selection feature control pin. 85 BKLIT I Back light function. Pulse low to set BKOUT pin output. 86 KEY I Pulse to V- to change mode. In ADP mode, if this pin is connected to V-, the buzzer output will be off when the ADP input overflows. 87 SLACDC I Select initial state. Please refer to page 15 88 FC5 I Switch 5 for function selection. 89 FC4 I Switch 4 for function selection. 90 FC3 I Switch 3 for function selection. 91 FC2 I Switch 2 for function selection. 92 FC1 I Switch 1 for function selection. 93 LBAT9 I Low battery configuration. If 3V battery is used, connect it to AGND. The default low-battery threshold voltage is –2.3V. If 9V battery is Used, the low battery annunciator is displayed when the voltage of this pin is less than VRH (-1.2V) 94 SDO O RS232 compliant serial data output. 95 C+ O Positive capacitor connection for on-chip DC-DC converter. 96 C- O Negative capacitor connection for on-chip DC-DC converter. 97 V- P Negative supply voltage. Connecting to 3V battery negative terminal. 98 DGND P/G Digital ground. Connecting to 3V battery positive terminal. 99 AGND P/G Analog ground. 100 AGND P/G Analog ground. |
Аналогичный номер детали - ES51918 |
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Аналогичное описание - ES51918 |
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