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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST7FOXU0 데이터시트(PDF) 57 Page - STMicroelectronics |
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ST7FOXU0 데이터시트(HTML) 57 Page - STMicroelectronics |
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57 / 123 page  ST7FOXU0 Power saving modes 57/123 8.5.3 AWUFH Prescaler Register (AWUPR) Reset value: 1111 1111 (FFh) Bits 7:0= AWUPR[7:0] Auto Wake Up Prescaler These 8 bits define the AWUPR Dividing factor (see Table 13). In AWU mode, the time during which the MCU stays in Halt mode, tAWU, is given by the equation below. See also Figure 25 on page 54. The AWUPR prescaler register can be programmed to modify the time during which the MCU stays in Halt mode before waking up automatically. Note: If 00h is written to AWUPR, the AWUPR remains unchanged. 7 0 AWUPR7 AWUPR6 AWUPR5 AWUPR4 AWUPR3 AWUPR2 AWUPR1 AWUPR0 Read/Write Table 13. Configuring the dividing factor AWUPR[7:0] Dividing factor 00h Forbidden 01h 1 ... ... FEh 254 FFh 255 t AWU 64 AWUPR × 1 f AWURC -------------------- × t RCSTRT + = Table 14. AWU register mapping and reset values Address (Hex.) Register label 7 6543 210 0048h AWUCSR Reset Value 0 0000 AWUF AWUM AWUEN 0049h AWUPR Reset Value AWUPR7 1 AWUPR6 1 AWUPR5 1 AWUPR4 1 AWUPR3 1 AWUPR2 1 AWUPR1 1 AWUPR0 1 |
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