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SPAKMC331MFV16 Datasheet(PDF) 10 Page - Freescale Semiconductor, Inc |
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SPAKMC331MFV16 Datasheet(HTML) 10 Page - Freescale Semiconductor, Inc |
10 / 84 page 10 MC68331TS/D NOTES: 1. DATA[15:0] are synchronized during reset only. MODCLK is synchronized only when used as an input port pin. 2. EXTAL, XFC, and XTAL are clock reference connections. 3. PAI and PCLK can be used for discrete input, but are not part of an I/O port. 2.2 MCU Power Connections 2.3 MCU Driver Types 2.4 Signal Characteristics RXD — N N — — SCK Bo Y Y I/O PQS2 SIZ[1:0] B Y N I/O PE[7:6] TSC — Y Y — — TXD Bo Y Y I/O PQS7 XFC2 — — — Special — XTAL2 — — — Special — Table 3 MCU Power Connections VDDSYN Clock Synthesizer Power VSSE/VDDE External Periphery Power (Source and Drain) VSSI/VDDI Internal Module Power (Source and Drain) Table 4 MCU Driver Types Type I/O Description A O Output-only signals that are always driven; no external pull-up required Aw O Type A output with weak P-channel pull-up during reset B O Three-state output that includes circuitry to pull up output before high impedance is es- tablished, to ensure rapid rise time. An external holding resistor is required to maintain logic level while the pin is in the high-impedance state. Bo O Type B output that can be operated in an open-drain mode Table 5 MCU Signal Characteristics Signal Name MCU Module Signal Type Active State ADDR[23:0] SIM Bus — AS SIM Output 0 AVEC SIM Input 0 BERR SIM Input 0 BG SIM Output 0 BGACK SIM Input 0 BKPT CPU32 Input 0 BR SIM Input 0 CLKOUT SIM Output — CS[10:0] SIM Output 0 CSBOOT SIM Output 0 DATA[15:0] SIM Bus — DS SIM Output 0 Table 2 MCU Pin Characteristics (Continued) Pin Mnemonic Output Driver Input Synchronized Input Hysteresis Discrete I/O Port Designation Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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