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71M6534 Datasheet(PDF) 25 Page - Maxim Integrated Products |
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71M6534 Datasheet(HTML) 25 Page - Maxim Integrated Products |
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25 / 132 page  FDS_6533_6534_004 71M6533/G/H and 71M6534/H Data Sheet Rev 2 25 Table 13: Stretch Memory Cycle Width CKCON[2:0] Stretch Value Read Signal Width Write Signal Width memaddr memrd memaddr memwr 000 0 1 1 2 1 001 1 2 2 3 1 010 2 3 3 4 2 011 3 4 4 5 3 100 4 5 5 6 4 101 5 6 6 7 5 110 6 7 7 8 6 111 7 8 8 9 7 1.4.4 71M6533/71M6534-Specific Special Function Registers Table 14 shows the location and description of the 71M6533/71M6534-specific SFRs. Table 14: 71M6533/71M6534 Specific SFRs Register (Alternate Name) SFR Address Bit Field Name R/W Description EEDATA 0x9E R/W I2C EEPROM interface data register. EECTRL 0x9F R/W I2C EEPROM interface control register. See Section 1.5.10 EEPROM Interface for a description of the command and status bits available for EECTRL. ERASE (FLSH_ERASE) 0x94 W This register is used to initiate either the Flash Mass Erase cycle or the Flash Page Erase cycle. See the Flash Memory section for details. FL_BANK[2:0] 0xB6[2:0] R/W Flash Bank Selection. PGADDR (FLSH_PGADR) 0xB7 R/W Flash Page Erase Address register. Contains the flash memory page address (page 0 through page 127) that will be erased during the Page Erase cycle (default = 0x00). Must be re- written for each new Page Erase cycle. FLSHCRL 0xB2[0] FLSH_PWE R/W Program Write Enable: 0: MOVX commands refer to XRAM Space, normal operation (default). 1: MOVX @DPTR,A moves A to Program Space (Flash) @ DPTR. 0xB2[1] FLSH_MEEN W Mass Erase Enable: 0: Mass Erase disabled (default). 1: Mass Erase enabled. Must be re-written for each new Mass Erase cycle. 0xB2[4] WRPROT_CE* Protects flash from address CE_LCTN *1024 to the end of memory from flash page erase. 0xB2[5] WRPROT_BT* Protects flash from address 0 to address BOOT_SIZE*1024 from flash page erase. 0xB2[6] SECURE R/W Enables security provisions that prevent external reading of flash memory and CE program RAM. This bit is reset on chip reset and may only be set. Attempts to write zero are ignored. 0xB2[7] PREBOOT R Indicates that the preboot sequence is active. * The WRPROT_CE and WRPROT_BT bits can only be cleared when the SECURE bit is not set. When SECURE = 1, WRPROT_CE and WRPROT_BT can only be set to 1. A hardware reset is required to clear these bits if SECURE = 1. |
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