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P90CL301 Datasheet(PDF) 11 Page - NXP Semiconductors |
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P90CL301 Datasheet(HTML) 11 Page - NXP Semiconductors |
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11 / 92 page  1996 Dec 11 11 Philips Semiconductors Preliminary specification Low voltage 16-bit microcontroller P90CL301BFH (C100) Table 12 Bus size depending on BSIZE, CSBTX and BSn (n = 0 to 6) Notes 1. Depending on bit BSn in register BSREG. 2. The default value after reset of bits BSn in register BSREG is logic 0 which corresponds to 16-bit mode for CS0 to CS6. In this case, it is recommended to set BSn to logic 1 in the boot routine. Afterwards if CSBTX is set to logic 1, BSn can be reset to logic 0 by software for further transfers in 16-bit mode. 6.4 System Control Register (SYSCON) The P90CL301BFH uses a System Control Register (SYSCON) for adjusting system parameters. Table 13 System Control Register (address FFFF 8000H) Notes 1. The default values after a CPU reset: PCLK1 = 1 and PCLK0 = 1; all other SYSCON bits are a logic 0. 2. All bits are reset by the RESET instruction, except the IDL bit which is only reset by a CPU reset. PIN BSIZE BIT CSBTX BUS SIZE OF CS0 TO CS6(1) BUS SIZE OF CSBTX PORT PL AVAILABLE (P0 TO P7) BSn = 0 BSn = 1 AT BOOT AFTER BOOT 0 0 16 bit 8 bit 16 16 no 0 1 16 bit 8 bit 16 8 yes 1 0 note 2 8 bit 8 8 yes 1 1 16 bit 8 bit 8 16 no 15 14 13 12 11 10 9 8 7(1) 6(1) 54 3 2 1(2) 0 WDSC BPE CSBTX STBY PCLK3 PCLK2 PDE GF PCLK1 PCLK0 IM WD FBC PD IDL DOFF |
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