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SH33F2801P/032PR bảng dữ liệu(PDF) 39 Page - SINOWEALTH Electronic Ltd |
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SH33F2801P/032PR bảng dữ liệu(HTML) 39 Page - SINOWEALTH Electronic Ltd |
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39 / 407 page ![]() SH33F2801 39 8.6.1 Flash Acess Control Register (FLASH_ACR) Offset Address: 0x0000 Reset Value: 0x0000 0000 b31 b30 b29 b28 b27 b26 b25 b24 b23 b22 b21 b20 b19 b18 b17 b16 LOCK[15:0] WO 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 b15 b14 b13 b12 b11 b10 b9 b8 b7 b6 b5 b4 b3 b2 b1 b0 Reserved CRST DCEN Reserv ed PRFTE N Reserved LATENCY[2:0] - RW RW - RW - RW 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Bit Symbol Description 31 ~ 16 LOCK[15:0] Register lock bits 0x5AA5: Unlock this register Other: Lock this register When configuring this register, 0x5AA5 must be input to the unlock bits at the same time. After the operation is completed, it will be automatically locked. Reading this LOCK bits will firmly get 0x0000. 15 ~ 12 Reserved - 11 CRST Reset buffer block 0: no reset buffer 1: reset buffer (data buffer and instruction butter block are reset at the same time) 10 DCEN Data buffer enabling 0: Data buffer block is disable 1: Data buffer block is enable 9 Reserved - 8 PRFTEN Prefetch buffer enabling 0: Prefetch buffer block is disable 1: Prefetch buffer block is enable 7 ~ 3 Reserved - 2 ~ 0 LATENCY[2:0] SYSCLK (system clock) cycle and flash access time configuration settings 000: 0 waiting status 001: 1 waiting status 010: 2 waiting status 011: 3 waiting status 100: 4 waiting status 101: 5 waiting status 110: 6 waiting status 111: 7 waiting status |
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