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AT89LP6440 Datasheet(PDF) 21 Page - ATMEL Corporation |
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AT89LP6440 Datasheet(HTML) 21 Page - ATMEL Corporation |
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21 / 194 page ![]() 21 3706A–MICRO–9/09 AT89LP6440 - Preliminary 4. Special Function Registers A map of the on-chip memory area called the Special Function Register (SFR) space is shown in Table 4-1. See also “Register Index” on page 153. Note that not all of the addresses are occupied, and unoccupied addresses may not be imple- mented on the chip. Read accesses to these addresses will in general return random data, and write accesses will have an indeterminate effect. User software should not write to these unlisted locations, since they may be used in future products to invoke new features. Notes:1. All SFRs in the left-most column are bit-addressable. 2. Reset value is 1111 1111B when Tristate-Port Fuse is enabled and 0000 0000B when disabled. Table 4-1. AT89LP6440 SFR Map and Reset Values 8 9A B C D E F 0F8H 0FFH 0F0H B 0000 0000 BX 0000 0000 0F7H 0E8H SPSR 000x x000 SPCR 0000 0000 SPDR xxxx xxxx 0EFH 0E0H ACC 0000 0000 AX 0000 0000 DSPR 0000 0000 FIRD 0000 0000 MACL 0000 0000 MACH 0000 0000 0E7H 0D8H DADC 0000 0000 DADI 0000 0000 DADL 0000 0000 DADH 0000 0000 0DFH 0D0H PSW 0000 0000 T2CCA 0000 0000 T2CCL 0000 0000 T2CCH 0000 0000 T2CCC 0000 0000 T2CCF 0000 0000 0D7H 0C8HT2CON 0000 0000 T2MOD 0000 0000 RCAP2L 0000 000 RCAP2H 0000 0000 TL2 0000 000 TH2 0000 0000 0CFH 0C0H P4 xx11 1111 P1M0(2) P1M1 0000 0000 P2M0(2) P2M1 0000 0000 P3M0(2) P3M1 0000 0000 0C7H 0B8H IP 0000 0000 SADEN 0000 0000 P0M0 1111 1111 P0M1 0000 0000 P4M0(2) P4M1 xx00 0000 0BFH 0B0H P3 1111 1111 IE2 xxxx x000 IP2 xxxx x000 IP2H xxxx x000 IPH 0000 0000 0B7H 0A8H IE 0000 0000 SADDR 0000 0000 TWCR 0000 0000 TWSR 0000 0000 TWAR 0000 0000 TWDR 0000 0000 TWBR 0000 0000 AREF 0000 0000 0AFH 0A0H P2 1111 1111 DPCF 0000 00x0 WDTRST (write-only) WDTCON 0000 x000 0A7H 98H SCON 0000 0000 SBUF xxxx xxxx GPMOD 0000 0000 GPLS 0000 0000 GPIEN 0000 0000 GPIF 0000 0000 SPX xxxx 0000 ACSRB 1100 0000 9FH 90H P1 1111 1111 TCONB 0010 0100 RL0 0000 0000 RL1 0000 0000 RH0 0000 0000 RH1 0000 0000 MEMCON 0000 00xx ACSRA 0000 0000 97H 88H TCON 0000 0000 TMOD 0000 0000 TL0 0000 0000 TL1 0000 0000 TH0 0000 0000 TH1 0000 0000 AUXR 0000 0000 CLKREG 0000 x000 8FH 80H SP 0000 0111 DP0L 0000 0000 DP0H 0000 0000 DP1L 0000 0000 DP1H 0000 0000 PAGE 0000 0000 PCON 0000 0000 87H 0 123 456 7 |
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