tmp90p802ap ETC-unknow, tmp90p802ap Datasheet - Page 7

• Manufacturer Part Number: tmp90p802ap
• Manufacturer: ETC-unknow

TOSHIBA CORPORATION
3.2 PROM Mode
(1)
(2)
Mode Setting and Function
PROM mode is set by setting the
to the “L” level.
Programming Flow Chart
The programming mode is set by applying 12.5V
(programming voltage) to the VPP pin when the following
pins are set as follows,
After the address and data have been fixed, a data on
the Data Bus is programmed when the CE pin is set to
“Low” (1ms plus is required).
General Programming procedure of an EPROM program-
mer is as follows,
(Vcc
(
(CLK
RESET
: 6.0V)
: “L” level) obtained by using adaptor
: “L” level) socket.
*These conditions can be
RESET
Figure 3.2. PROM Mode Pin Setting
and CLK pins
The programming and verification for the internal
PROM is achieved by using a general PROM programmer
with the adaptor socket. The device selection (ROM
Type) should be “27256” with following conditions.
size : 256Kbit (32K x 8-bit) VPP: 12.5V TPW: 1ms
Figure 3.2 shows the setting of pins in PROM mode.
• Write a data to a specified address for 1ms.
• Verify the data. If the read-out data does not match
the expected data, another writing is performed until
the correct data is written (Max. 25 times).
After the correct data is written, an additional writing is
performed by using three times longer programming
pulse width (1ms x programming times), or using three
times more programming pulse number. Then, verify
the data and increment the address.
The verification for all data is done under the condition
of Vpp = Vcc = 5V after all data were written.
Figure 3.3 shows the programming flow chart.
TMP90P802A
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