COP8SCR9KMT7 datasheet(28/80 Pages) NSC

28 / 80 page

11.0 In-System Programming

(Continued)

11.3.2 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 6. 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

11.3.3 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 7. 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

11.3.4 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 8. 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 11.7 MICROWIRE/PLUS ISP for more information

on available ISP commands. On Reset, the PGMTIM regis-

ter is loaded with the value that corresponds to 10 MHz

frequency for CKI.

TABLE 8. PGMTIM Register Format

PGMTIM

CKI Frequency Range

76543210

00000001

25 kHz–33.3 kHz

00000010

37.5 kHz–50 kHz

00000011

50 kHz–66.67 kHz

00000100

62.5 kHz–83.3 kHz

00000101

75 kHz–100 kHz

00000111

100 kHz–133 kHz

00001000

112.5 kHz–150 kHz

00001011

150 kHz–200 kHz

00001111

200 kHz–266.67 kHz

00010001

225 kHz–300 kHz

00010111

300 kHz–400 kHz

00011101

375 kHz–500 kHz

00100111

500 kHz–666.67 kHz

00101111

600 kHz–800 kHz

00111111

800 kHz–1.067 MHz

01000111

1 MHz–1.33 MHz

01001000

1.125 MHz–1.5 MHz

01001011

1.5 MHz–2 MHz

01001111

2 MHz–2.67 MHz

01010100

2.625 MHz–3.5 MHz

01011011

3.5 MHz–4.67 MHz

01100011

4.5 MHz–6 MHz

01101111

6 MHz–8 MHz

01111011

7.5 MHz–10 MHz

R/W

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