M16CSLASH62 datasheet(277/621 Pages) RENESAS

277 / 621 page

Mitsubishi microcomputers

M16C / 62 Group

SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Appendix Standard Serial I/O Mode (Flash Memory Version)

262

7A16

CLK1

RxD1

TxD1

RTS1(BUSY)

(M16C reception data)

(M16C transmit data)

Read Lock Bit Status Command

This command reads the lock bit status of the specified block. Execute the read lock bit status com-

mand as explained here following.

(1) Send the “7116” command code in the 1st byte of the transmission.

(2) Send addresses A8 to A15 and A16 to A23 in the 2nd and 3rd bytes of the transmission respec-

tively.

(3) The lock bit data of the specified block is output in the 4th byte of the transmission. Write the

highest address of the specified block for addresses A8 to A23.

CLK1

RxD1

TxD1

RTS1(BUSY)

A8 to

A15

A16 to

A23

7116

DQ6

(M16C reception data)

(M16C transmit data)

Figure 1.31.10. Timing for reading lock bit status

Figure 1.31.11. Timing for enabling the lock bit

Lock Bit Enable Command

This command enables the lock bit in blocks whose bit was disabled with the lock bit disable com-

mand. The command code “7A16” is sent in the 1st byte of the serial transmission. This command only

enables the lock bit function; it does not set the lock bit itself.

M16C/62 Datasheet(PDF) 277 Page - Renesas Technology Corp