PD78F0701Y_15 Datasheet, PDF (22/54 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCONTROLLER

µPD78F0701Y
(2) Flash programming mode control register (FLPMC)
The flash programming mode control register (FLPMC) is used to select an operation mode and check the
status of the VPP pin.
This register is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets FLPMC to 08H.
Figure 6-6. Format of Flash Programming Mode Control Register (FLPMC)
Symbol 7
FLPMC 0
6
5
0
0
4
3
2
1
0
Address When reset R/W
0
1
VPP
0 FLSPM0
FFCDH 08H^{Note 1} R/W^{Note 2}
VPP
0
1
Applied voltage of VPP pin
The voltage necessary for erasing/writing flash memory is not
applied to the VPP pin.
A voltage higher than that on the VDD pin is applied to the VPP pin.
FLSPM0
Operation mode selection
0 Normal operation mode
1 Self-writing mode
Notes 1. Bit 2 changes depending on the level of the VPP pin.
2. Bit 2 is a read-only bit.
Cautions 1. Clear bits 1 and 4 to 7 to 0, and set bit 3 to 1.
2. The VPP bit indicates the status of the voltage applied to the VPP pin. When the VPP bit
is "0", the voltage necessary for erasing/writing the flash memory is not applied to the
VPP pin. However, the voltage necessary for erasing/writing is not always applied even
when the VPP bit is "1". Configure the hardware so that the necessary voltage is
accurately applied to the VPP pin. To check whether the necessary voltage is also
applied to the VPP pin by software, not only by hardware, use an external hardware
detection circuit and its output signals.
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Preliminary Product Information U13563EJ2V0PM00