UPD78F0988AGC-8BS Renesas Electronics America, UPD78F0988AGC-8BS Datasheet - Page 326

• Manufacturer Part Number: UPD78F0988AGC-8BS
• Manufacturer: Renesas Electronics America

Specifications of UPD78F0988AGC-8BS

• Lead Free Status / Rohs Status: Supplier Unconfirmed

18.4.2 Flash programming mode control register
V
18.4.3 Self-write procedure
324
PP
The flash programming mode control register (FLPMC) is a register for checking the operation mode selection and
FLPMC is set by a 1-bit or 8-bit memory manipulation instruction.
RESET input clears this register to 08H.
Notes 1. Bit 2 changes depending on the level of V
Cautions 1. The VPP bit indicates the status of the voltage applied to the V
The procedure for performing self write is shown below (see Figure 18-16).
(1) Disable interrupts.
(2) Designate the self-write mode (FLPMC = 09H).
(3) Select register bank 3.
(4) Specify the start address of the entry RAM for the HL register.
(5) V
(6) Check the V
(7) Initialize the flash subroutine.
(8) Set the parameters.
(9) Control the flash memory (erase, write, etc.).
(10) V
(11) Designate the normal operating mode (FLPMC = 08H).
pin status.
PP
PP
2. Bit 2 is read only.
: ON (ON signal for voltage IC)
: OFF (OFF signal for voltage IC)
FLPMC
Symbol
2. The initial values of bits 1 and 3 to 7 should not be changed.
voltage required for erase/write is not being applied. However, even if the VPP bit is 1, it does
not necessarily mean that the voltage required for erase/write is being applied. Set the
hardware so that the voltage required for erase/write is applied to the V
Also, if using software in addition to hardware to check that the voltage required for erase/
write is being applied, use an external hardware detection circuit and its output.
PP
FLSPM0
Figure 18-15. Format of Flash Programming Mode Control Register
VPP
7
0
level.
0
1
0
1
The voltage required for erase/write is not
applied to V
Voltage greater than that of V
V
Normal operation mode
Self-write mode
6
0
PP
pin.
0
5
Operation mode selection
PP
V
pin.
PP
4
0
pin voltage status
CHAPTER 18
User’s Manual U13029EJ7V1UD
1
3
VPP
DD
2
pin is applied to
PP
.
PD78F0988A
1
0
FLSPM0
0
Address
FF89H
PP
pin. If the VPP bit is 0, the
After reset
08H
Note 1
PP
pin.
R/W
R/W
Note 2