SH79F166APSLASH044PR datasheet(22/113 Pages) SINOWEALTH

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SH79F166A

7.3.2 Flash Operation in ICP Mode

ICP mode is performed without removing the micro-controller from the system. In ICP mode, the user system must be

power-off, and the programmer can refresh the program memory through ICP programming interface. The ICP programming

interface consists of 6 wires (VDD, GND, TCK, TDI, TMS, TDO).

At first the four JTAG pins (TDO, TDI, TCK, TMS) are used to enter the programming mode. Only after the three pins are

inputted the specified waveform, the CPU will enter the programming mode. For more detail description please refers to the

FLASH Programmer’s user guide.

The ICP mode supports the following operations:

(1) Code-Protect Control mode Programming

SH79F166A implements code-protect function to offer high safeguard for customer code. Two modes are available for each

sector.

Code-protect control mode 0: Used to enable/disable the write/read operation (except mass erase) from any

programmer.

Code-protect control mode 1: Used to enable/disable the read operation through MOVC instruction from other sectors; or

the sector erase/write operation through SSP Function.

To enable the wanted protect mode, the user must use the Flash Programmer to set the corresponding protect bit.

(2) Mass Erase

The mass erase operation will erase all the contents of program code, code option, code protect bit and customer code ID,

regardless the status of code-protect control mode. (The Flash Programmer supplies customer code ID setting function for

customer to distinguish their product.)

Mass erase is only available in Flash Programmer.

(3) Sector Erase

The sector erase operation will erase the contents of program code of selected sector . This operation can be done by Flash

Programmer or the user’s program.

If done by the Flash Programmer, the code-protect control mode 0 of the selected sector must be disabled.

(4) EEPROM-Like Erase

The EEPROM-Like erase operation will erase the contents of program code of EEPROM-Like. This operation can be done

by Flash Programmer or the user’s program.

(5) Write/Read Code

The Write/Read Code operation will write the customer code into the Flash Programming Memory or read the customer

code from the Flash Programming Memory. This operation can be done by Flash Programmer or the user’s program.

If done by the user’s program, the code-protect control mode 1 of the selected sector must be disabled. But the program can

read/write its own sector regardless of its security bit.

If done by the Flash Programmer, the code-protect control mode 0 of the selected sector must be disabled.

(6) Write/Read EEPROM-Like

The Write/Read EEPROM-Like operation will write the customer data into the EEPROM-Like or read the customer data

from the EEPROM-Like. This operation can be done by Flash Programmer or the user’s program.

Operation

ICP

SSP

Code Protection

Yes

Sector Erase

Yes

(without security bit)

Yes

(without security bit)

Mass Erase

Yes

EEPROM-like Erase

Yes

Write/Read

Yes

(without security bit)

Yes

(without security bit or its own sector)

EEPROM-like Write/Read

Yes

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