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MSC1202Y2RHHT Folha de dados(PDF) 73 Page - Texas Instruments |
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MSC1202Y2RHHT Folha de dados(HTML) 73 Page - Texas Instruments |
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73 / 92 page ![]() MSC1200 MSC1201 MSC1202 SBAS317E − APRIL 2004 − REVISED MAY 2006 www.ti.com 73 Summation/Shifter Control (SSCON) 7 6 5 4 3 2 1 0 Reset Value SFR E1h SSCON1 SSCON0 SCNT2 SCNT1 SCNT0 SHF2 SHF1 SHF0 00h The Summation register is powered down when the ADC is powered down. If all zeroes are written to this register, the 32-bit SUMR3−0 registers will be cleared. The Summation registers will do sign-extend if Bipolar Mode is selected in ADCON1. SSCON1−0 Summation/Shift Count. bits 7−6 SSCON1 SSCON0 SCNT2 SCNT1 SCNT0 SHF2 SHF1 SHF0 DESCRIPTION 0 0 0 0 0 0 0 0 Clear Summation Register 0 0 0 1 0 0 0 0 CPU Summation on Write to SUMR0 (sum count/shift ignored) 0 0 1 0 0 0 0 0 CPU Subtraction on Write to SUMR0 (sum count/shift ignored) 1 0 x x x Note (1) Note (1) Note (1) CPU Shift only 0 1 Note (1) Note (1) Note (1) x x x ADC Summation only 1 1 Note (1) Note (1) Note (1) Note (1) Note (1) Note (1) ADC Summation completes, then shift completes (1) Refer to register bit definition. SCNT2−0 Summation Count. When the summation is complete an interrupt will be generated unless masked. Reading the bits 5−3 SUMR0 register clears the interrupt. SCNT2 SCNT1 SCNT0 SUMMATION COUNT 0 0 0 2 0 0 1 4 0 1 0 8 0 1 1 16 1 0 0 32 1 0 1 64 1 1 0 128 1 1 1 256 SHF2−0 Shift Count. bits 2−0 SHF2 SHF1 SHF0 SHIFT DIVIDE 0 0 0 1 2 0 0 1 2 4 0 1 0 3 8 0 1 1 4 16 1 0 0 5 32 1 0 1 6 64 1 1 0 7 128 1 1 1 8 256 |
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