COP8CFE9 datasheet(21/63 Pages) NSC

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5.0 In-System Programming

(Continued)

5.3.2 ISP Read Data Register

The Read Data Register (ISPRD) contains the value read

back from a read operation. This register can be accessed

from either flash program memory or Boot ROM. This regis-

ter is undefined on Reset.

TABLE 7. ISP Read Data Register

ISPRD

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

5.3.3 ISP Write Data Register

The Write Data Register (ISPWR) contains the data to be

written into the specified address. This register is undeter-

mined on Reset. This register can be accessed from either

flash program memory or Boot ROM. The Write Data register

must be maintained for the entire duration of the operation.

TABLE 8. ISP Write Data Register

ISPWR

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

5.3.4 ISP Write Timing Register

The Write Timing Register (PGMTIM) is used to control the

width of the timing pulses for write and erase operations. The

value to be written into this register is dependent on the

frequency of CKI and is shown in

Table 9. This register must

be written before any write or erase operation can take

place. It only needs to be loaded once, for each value of CKI

frequency. This register can be loaded from either flash

program memory or Boot ROM and must be maintained for

the entire duration of the operation. The MICROWIRE/PLUS

ISP routine that is resident in the boot ROM requires that this

Refer to

5.7 MICROWIRE/PLUS ISP for more information on

available ISP commands. On Reset, the PGMTIM register is

loaded with the value that corresponds to 10 MHz frequency

for CKI.

TABLE 9. PGMTIM Register Format

PGMTIM

CKI Frequency Range

654

25 kHz–33.3 kHz

37.5 kHz–50 kHz

50 kHz–66.67 kHz

62.5 kHz–83.3 kHz

75 kHz–100 kHz

100 kHz–133 kHz

112.5 kHz–150 kHz

150 kHz–200 kHz

200 kHz–266.67 kHz

225 kHz–300 kHz

300 kHz–400 kHz

375 kHz–500 kHz

500 kHz–666.67 kHz

600 kHz–800 kHz

800 kHz–1.067 MHz

1 MHz–1.33 MHz

1.125 MHz–1.5 MHz

1.5 MHz–2 MHz

2 MHz–2.67 MHz

2.625 MHz–3.5 MHz

3.5 MHz–4.67 MHz

4.5 MHz–6 MHz

6 MHz–8 MHz

7.5 MHz–10 MHz

R/W

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