HD6475328-CP10 Datasheet, PDF (312/459 Pages) Hitachi Semiconductor – original Hitachi CMOS microcomputer unit (MCU)

Figure 17-4 shows the basic high-speed programming flowchart.
Tables 17-5 and 17-6 list the electrical characteristics of the chip in the PROM mode. Figure 17-5
shows a write/verify timing chart.
N
S = 25
Y
n<S
START
SET program mode
Vcc = 6.0V ±0.25V, Vpp = 12.5V ±0.3V
Address = 0
n=0
n + 1→1
Write time tpw = 1 ms ±5%
SET verify mode
Vcc = 6.0V ±0.25V, Vpp = 12.5V ±0.3V
N
Verify OK?
Y
SET program mode
Vcc = 6.0V ±0.25V, Vpp = 12.5V ±0.3V
Address + 1 → Address
Write topw = 3n ms
N
Last address?
Y
SET read mode
Vcc = 5.0V ±0.5V, Vpp = Vcc
Error
NOGO
All address read?
GO
END
Figure 17-4 High-Speed Programming Flowchart
300