Programmer Mode; Power-Down States For Flash Memory; Table 18.6 Flash Memory Operating States - Renesas H8S Series Hardware Manual

16-bit single-chip microcomputer

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entered by re-setting the P1 or E1 bit. However, PV1 and EV1 bit setting is enabled, and a

transition can be made to verify mode. Error protection can be cleared only by a power-on reset.

Programmer Mode

In programmer mode, a PROM programmer can be used to perform programming/erasing via a

socket adapter, just as for a discrete flash memory. Use a PROM programmer that supports the

Renesas 128-kbyte flash memory on-chip MCU device type (FZTAT128V5A).

In user mode, the flash memory will operate in either of the following states:

• Normal operating mode

The flash memory can be read and written to.

• Standby mode

All flash memory circuits are halted.

Table 18.6 shows the correspondence between the operating modes of the H8S/2612 Group and

the flash memory. When the flash memory returns to its normal operating state from standby

mode, a period to stabilize the power supply circuits that were stopped is needed. When the flash

memory returns to its normal operating state, bits STS2 to STS0 in SBYCR must be set to provide

a wait time of at least 20 µs, even when the external clock is being used.

LSI Operating State

Standby mode

Flash Memory Operating State

Normal operating mode

Standby mode

Rev. 6.00 Mar 15, 2006 page 479 of 570

Section 18 ROM

REJ09B0211-0600