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P87C51MB2 Datasheet(PDF) 9 Page - NXP Semiconductors |
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P87C51MB2 Datasheet(HTML) 9 Page - NXP Semiconductors |
9 / 34 page 2001 Apr 06 9 Philips Semiconductors Preliminary specification P87C51MB2/P87C51MC2 80C51 8-bit microcontroller family with extended memory 64KB/96KB OTP with 2KB/3KB RAM SPECIAL FUNCTION REGISTERS Note: Special Function Register (SFR) accesses are restricted in the following ways: 1. User must NOT attempt to access any SFR locations not defined. 2. SFR bits labeled ’-’, ’0’ or ’1’ can ONLY be written and read as follows: - ’-’ MUST be written with ’0’, but can return any value when read (even if it was written with ’0’). It is a reserved bit and may be used in future derivatives. - ’0’ MUST be written with ’0’, and will return a ’0’ when read. - ’1’ MUST be written with ’1’, and will return a ’1’ when read. Special Function Registers SYMBOL DESCRIPTION DIRECT ADDRESS BIT ADDRESS, SYMBOL, OR ALTERNATE PORT FUNCTION Reset Value MSB LSB E7 E6 E5 E4 E3 E2 E1 E0 ACC* Accumulator E0H 00H AUXR# Auxiliary Function Register 8EH - - - - - - EXTRAM AO 00H% AUXR1# Auxiliary Function Register 1 A2H - - - LPEP GF2 0 - DPS 00H% F7 F6 F5 F4 F3 F2 F1 F0 B* B Register F0H 00H BRGR0#§ Baud Rate Generator Rate Low 86H‡ BRATE11 BRATE10 BRATE9 BRATE8 BRATE7 BRATE6 BRATE5 BRATE4 00H BRGR1#§ Baud Rate Generator Rate High 87H‡ BRATE3 BRATE2 BRATE1 BRATE0 - - - - 00H% BRGCON# Baud Rate Generator Control 85H‡ - - - - - - S0BRGS BRGEN 00H% CCAP0H# Module 0 Capture High FAH XXH CCAP1H# Module 1 Capture High FBH XXH CCAP2H# Module 2 Capture High FCH XXH CCAP3H# Module 3 Capture High FDH XXH CCAP4H# Module 4 Capture High FEH XXH CCAP0L# Module 0 Capture Low EAH XXH CCAP1L# Module 1 Capture Low EBH XXH CCAP2L# Module 2 Capture Low ECH XXH CCAP3L# Module 3 Capture Low EDH XXH CCAP4L# Module 4 Capture Low EEH XXH CCAPM0# Module 0 Mode DAH - ECOM_0 CAPP_0 CAPN_0 MAT_0 TOG_0 PWM_0 ECCF_0 00H% CCAPM1# Module 1 Mode DBH - ECOM_1 CAPP_1 CAPN_1 MAT_1 TOG_1 PWM_1 ECCF_1 00H% CCAPM2# Module 2 Mode DCH - ECOM_2 CAPP_2 CAPN_2 MAT_2 TOG_2 PWM_2 ECCF_2 00H% CCAPM3# Module 3 Mode DDH - ECOM_3 CAPP_3 CAPN_3 MAT_3 TOG_3 PWM_3 ECCF_3 00H% CCAPM4# Module 4 Mode DEH - ECOM_4 CAPP_4 CAPN_4 MAT_4 TOG_4 PWM_4 ECCF_4 00H% |
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