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EM73P362 Datasheet(PDF) 6 Page - ELAN Microelectronics Corp |
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EM73P362 Datasheet(HTML) 6 Page - ELAN Microelectronics Corp |
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6 / 44 page  6 * This specification are subject to be changed without notice. 11.1.2001 EM73P362 EM73P362 EM73P362 EM73P362 EM73P362 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT 4-BIT MICRO-CONTROLLER FOR LCD PRODUCT STACK: There are 13-level (maximum) stack for user using for subroutine (including interrupt and CALL). User can assign any level be the starting stack by giving the level number to stack pointer (SP). ZERO- PAGE: From 00h to 0Fh is the location of zero-page. It is used as the pointer in zero-page addressing mode for the instruction of "STD #k,y; ADD #k,y; CLR y,b; CMP k,y". PROGRAM EXAMPLE: To wirte immediate data "07h" to address "03h" of RAM and to clear bit 2 of RAM. STD #07h, 03h ; RAM[03] ← 07h CLR 0Eh,2 ; RAM[0Eh] 2 ← 0 Increment Address 20h - 2Fh 30h - 33h Level 0 Level 4 Level 8 Level 12 Level 1 Level 5 Level 9 Level 2 Level 6 Level 10 Level 3 Level 7 Level 11 00h - 0Fh 10h - 1Fh Stack Zero-page DATA RAM ( 52-nibble ) DATA RAM ( 52-nibble ) DATA RAM ( 52-nibble ) DATA RAM ( 52-nibble ) DATA RAM ( 52-nibble ) There is total 52 - nibble data RAM from address 00 to 33h Data RAM includes 3 parts: zero page region, stacks and data area. PROGRAM EXAMPLE: Read out the ROM code of address 777h by table-look-up instruction. LDIA #07h; STADPL ; [DP] L ← 07h STADPM ; [DP] M ← 07h STADPH ; [DP] H ← 07h, Load DP=777h : LDL #00h; LDH #03h; LDAX ; ACC ← 6h STAMI ; RAM[30] ← 6h LDAXI ; ACC ← 5h STAM ; RAM[31] ← 5h ; ORG 777h DATA 56h; : When user using any instruction of CALL or subroutine, before entry the subroutine, the previous PC address will be saved into stack until return from those subroutines, the PC value will be restored by the data saved in stack. DATA AREA: Except the special area used by user, the whole RAM can be used as data area for storing and loading general data. |
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