U19858EJ1V0PM00_15 Datasheet, PDF (13/25 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCONTROLLER

8. CAUTIONS WHILE DEVELOPING PROGRAM
A reference flow chart of the program with RF transceiver
μPD78F8056, 78F8057, 78F8058
Start
Initial setting of an connection pin between the MCU and RF transceiver
· Setting of SI00 signal detection
Input mode (PM11 = 1)
· Setting of SO00 signal detection
Output mode (PM12 = 0), High Level (P12 = 1)
· Setting of SCK00 signal detection
Output mode (PM10 = 0) High Level (P10 = 1)
· Setting of SEN(serial enable) signal detection.
Output mode (PM17 = 0) High Level (disable) (P17 = 1)
Disable RESET for RF transceiver.
High Level (P130 = 1)
(Case of connects as 6. CONNECTION BETWEEN MCU AND RF RANSCEIVER)
Set ting of CSI00 for RF transceiver
(Transmission/reception, Type 4 at CSI mode, MSB first, 8-bit data length)
Communication with RF transceiver
(Set enable to SEN (serial enable) signal (P17 = 0))
While developing user program, please be sure to set the following setting as initial setting after reset.
Internal Port Name of MCU
Recommended setting
P05, P06, P30,
P42 to P44, P46, P47,
P50, P51, P53 to P55,
P60, P61, P64 to P67,
P70 to P75, P77,
P110, P140
set this port to output mode after reset
Preliminary Product Information U19858EJ1V0PM
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