M37754FFCGP Datasheet, PDF(18/68 Page) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION

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M37754FFCGP Datasheet, PDF (18/68 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION

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MITSUBISHI MICROCOMPUTERS

M37754FFCGP

M37754FFCHP

SHINGLE-CHIP 16-BIT CMOS MICROCOMPUTER FLASH MEMORY VERSION

Read-only mode

The microcomputer enters the read-only mode by applying VPPL to

the VPP pin. In this mode, the user can input the address of a

memory location to be read and the control signals at the timing

shown in Figure 8, and the M37754FFCGP and the M37754FFCHP

will output the contents of the userâs specified address from data I/O

pin to the external. In this mode, the user cannot perform any opera-

tion other than read.

VIH

Address

VIL

VIH

VIL

VIH

VIL

tWRR

VIH

VIL

Data

VOH Floating

VOL

Valid address

tRC

ta(CE)

tDF

ta(OE)

tOLZ

tCLZ

ta(AD)

tDH

Dout

Floating

Fig. 8 Read timing

Read/Write mode

The microcomputer enters the read/write mode by applying VPPH to

the VPP pin. In this mode, the user must first input a software com-

mand to choose the operation (e. g., read, program, or erase) to be

performed on the flash memory (this is called the first cycle), and

then input the information necessary for execution of the command

(e.g, address and data) and control signals (this is called the second

cycle). When this is done, the M37754FFCGP and the

M37754FFCHP execute the specified operation.

Table 3 shows the software commands and the input/output informa-

tion in the first and the second cycles. The input address is latched

___

internally at the falling edge of the WE input; software commands

and other input data are latched internally at the rising edge of the

___

WE input.

The following explains each software command. Refer to Figures 9

to 11 for details about the signal input/output timings.

Table 3. Software command (Parallel input/output mode)

Symbol

Read

Program

Program verify

Erase

Erase verify

Reset

Device identification

First cycle

Address input

Verify address

Data input

0016

4016

C016

2016

A016

FF16

9016

Note: ADI = Device identification address : manufacturerâs code 0000016, device code 0000116

DDI = Device identification data : manufacturerâs code 1C16, device code D016

X can be VIL or VIH.

Second cycle

Address input

Data I/O

Read address

Read data (Output)

Program address

Program data (Input)

Verify data (Output)

2016 (Input)

Verify data (Output)

FF16 (Input)

ADI

DDI (Output)

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