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SST89E554RC-40-I-NJ Datasheet(PDF) 11 Page - Silicon Storage Technology, Inc |
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SST89E554RC-40-I-NJ Datasheet(HTML) 11 Page - Silicon Storage Technology, Inc |
11 / 86 page Data Sheet FlashFlex51 MCU SST89E564RD / SST89V564RD / SST89E554RC / SST89V554RC 11 ©2003 Silicon Storage Technology, Inc. S71207-04-000 12/03 3.0 MEMORY ORGANIZATION The device has separate address spaces for program and data memory. 3.1 Program Flash Memory There are two internal flash memory blocks in the device. The primary flash memory block (Block 0) has 64/32 KByte. The secondary flash memory block (Block 1) has 8 KByte. Since the total program address space is limited to 64 KByte, the SFCF[1:0] bit are used to control program bank selection. Please refer to Figure 3-1 and Figure 3-2 for the program memory configurations. Program bank selection is described in the next section. The 64K/32K x8 primary SuperFlash block is organized as 512/256 sectors, each sector consists of 128 Bytes. The 8K x8 secondary SuperFlash block is organized as 64 sectors, each sector consists also of 128 Bytes. For both blocks, the 7 least significant program address bits select the byte within the sector. The remainder of the pro- gram address bits select the sector within the block. FIGURE 3-1: PROGRAM MEMORY ORGANIZATION FOR SST89E564RD AND SST89V564RD 1207 F02.0 External 64 KByte EA# = 0 FFFFH 0000H 64 KByte Block 0 EA# = 1 SFCF[1:0] = 01, 10, 11 FFFFH 0000H 56 KByte Block 0 8 KByte Block 1 EA# = 1 SFCF[1:0] = 00 FFFFH 2000H 0000H 1FFFH |
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