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SH7041A Folha de dados(PDF) 717 Page - Renesas Technology Corp

Nome de Peças SH7041A
Descrição Electrónicos  Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)
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Fabricante Electrônico  RENESAS [Renesas Technology Corp]
Página de início  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7041A Folha de dados(HTML) 717 Page - Renesas Technology Corp

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679
Address
Data
V
PP
V
CC
CE
PGM
OE
Write
Verify
t
AH
Read data
t
DF
t
DH
t
DS
t
AS
t
VPS
Write data
t
VCS
t
CES
t
PW
(t
OPW)
*
t
OES
t
OE
V
PP
V
CC
V
CC + 1
V
CC
Note: * t
OPW is defined by the values noted in the flowchart (figure 19.6).
Figure 21.7 Write/Verify Timing
21.3.3
Cautions on Writing
1. Writes must always be done with the established voltage and timing. The write voltage
(programming voltage) V
PP is 12.5 V (when the EPROM writer is set for the HN27C101
Hitachi specifications, V
PP becomes 12.5 V). Devices will sometimes be destroyed if a voltage
higher than the rated one is applied. Pay particular attention to such phenomena as EPROM
writer overshoot.
2. Always confirm that the indices of the EPROM writer socket, socket adapter, and device are in
agreement before programming. Devices will sometimes be destroyed due to excessive current
flow if these are not connected in the proper locations.
3. Do not touch the socket adapter or device during writing. Contact faults can sometimes cause
devices to be improperly written.
4. Page programming mode writes are not possible. Always set to byte programming mode.



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