3886 datasheet(96/380 Pages) RENESAS

96 / 380 page

1-71

3886 Group User’s Manual

HARDWARE

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 69, and the M38869FFAHP/GP will output the

contents of the user’s specified address from data I/O pin to the

external. In this mode, the user cannot perform any operation

other than read.

Fig. 69 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

command 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 com-

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

the second cycle). When this is done, the M38869FFAHP/GP ex-

ecutes the specified operation.

Table 23 shows the software commands and the input/output in-

formation 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 70

to 72 for details about the signal input/output timings.

Table 23 Software command (Parallel input/output mode)

Symbol

Read

Program

Program verify

Erase

Erase verify

Reset

Device identification

Address input

Verify address

First cycle

Data input

0016

4016

C016

2016

A016

FF16

9016

Address input

Read address

Program address

ADI

Second cycle

Data I/O

Read data (Output)

Program data (Input)

Verify data (Output)

2016 (Input)

Verify data (Output)

FF16 (Input)

DDI (Output)

Note: ADI = Device identification address : manufacturer’s code 0000016, device code 0000116

DDI = Device identification data : manufacturer’s code 1C16, device code D016

X can be VIL or VIH.

FUNCTIONAL DESCRIPTION

Address

Valid address

tRC

ta(CE)

tWRR

tDF

ta(OE)

tDH

tOLZ

Floating

tCLZ

ta(AD)

VIH

VIL

VIH

VIL

VIH

VIL

VIH

VIL

VOH

VOL

Data

Dout

3886 Datasheet(PDF) 96 Page - Renesas Technology Corp

3886 Datasheet(HTML) 96 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL