uPD789074 Subseries 8-Bit Single-Chip Microcontrollers UD - Home

CHAPTER 13 µPD78F907613.1.2 Communication modeUse the communication mode shown in Table 13-2 to perform communication between the dedicated flashprogrammer and µPD78F9076.Table 13-2. Communication Mode ListCommunicationModeCOMM PORTSIO ClockTYPE Setting Note 1CPU ClockIn Flashpro On Target BoardMultipleRatePins UsedNumber of VPPPulses3-wire serialI/OSIO ch-0(3-wire, sync.)100 Hz to 1, 2, 4, 5 1 to 5 MHz Note 2 1.0 SI20/RxD20/P221.25 MHz Note 2 MHz Notes 2, 3 SO20/TxD20/P21SCK20/ASCK20/P200UARTUART ch-0(Async.)4,800 to76,800 bps5 MHz Note 5 4.91 or5 MHz Note 2 1.0 RxD20/SI20/P22TxD20/SO20/P218Notes 2, 4Pseudo 3-wirePort A(Pseudo-3 wire)100 Hz to1 kHz1, 2, 4, 5 1 to 5 MHz Note 2 1.0 P01MHz Notes 2, 3 P02P0012Notes 1. Selection items for TYPE settings on the dedicated flash programmer (Flashpro III (part no. FL-PR3,PG-FP3)/Flashpro IV (part no. FL-PR4, PG-FP4)).2. The possible setting range differs depending on the voltage. For details, refer to CHAPTER 15ELECTRICAL SPECIFICATIONS (EXPANDED-SPECIFICATION PRODUCTS) and CHAPTER 16ELECTRICAL SPECIFICATIONS (CONVENTIONAL PRODUCTS).3. 2 or 4 MHz only for Flashpro III4. Because signal wave slew also affects UART communication, in addition to the baud rate error,thoroughly evaluate the slew.5. Only for Flashpro IV. However, when using Flashpro III, be sure to select the clock of the resonator onthe board. UART cannot be used with the clock supplied by Flashpro III.Figure 13-2. Communication Mode Selection Format10 VVPPVDDVSS1 2 nVPP pulsesRESETVDDVSS176User’s Manual U14801EJ3V1UD