UPD78F0535GB(T)-UEU-A NEC, UPD78F0535GB(T)-UEU-A Datasheet - Page 564
UPD78F0535GB(T)-UEU-A
Manufacturer Part Number
UPD78F0535GB(T)-UEU-A
Description
8BIT MCU, 60K FLASH, 3KB RAM, LQFP
Manufacturer
NEC
Datasheet
1.UPD78F0535GBT-UEU-A.pdf
(773 pages)
Specifications of UPD78F0535GB(T)-UEU-A
Controller Family/series
UPD78
No. Of I/o's
55
Ram Memory Size
3KB
Cpu Speed
20MHz
No. Of Timers
8
No. Of Pwm
RoHS Compliant
Core Size
8bit
Program Memory Size
60KB
Oscillator Type
External, Internal
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25.1 Functions of Option Bytes
the device is restarted from the reset status, the device automatically references the option bytes and sets specified
functions. When using the product, be sure to set the following functions by using the option bytes.
Therefore, set values that are the same as those of 0080H to 0084H to 1080H to 1084H in advance.
(1) 0080H/1080H
(2) 0081H/1081H
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The flash memory at 0080H to 0084H of the 78K0/KE2 is an option byte area. When power is turned on or when
When the boot swap operation is used during self-programming, 0080H to 0084H are switched to 1080H to 1084H.
Caution Be sure to set 00H to 0082H and 0083H (0082H/1082H and 0083H/1083H when the boot swap
Internal low-speed oscillator operation
• Can be stopped by software
• Cannot be stopped
Watchdog timer interval time setting
Watchdog timer counter operation
• Enabled counter operation
• Disabled counter operation
Watchdog timer window open period setting
Caution Set a value that is the same as that of 0080H to 1080H because 0080H and 1080H are
Selecting POC mode
• During 2.7 V/1.59 V POC mode operation (POCMODE = 1)
• During 1.59 V POC mode operation (POCMODE = 0)
Caution POCMODE can only be written by using a dedicated flash memory programmer. It cannot be
The device is in the reset state upon power application and until the supply voltage reaches 2.7 V (TYP.). It
is released from the reset state when the voltage exceeds 2.7 V (TYP.). After that, POC is not detected at
2.7 V but is detected at 1.59 V (TYP.).
With standard and (A) grade products, if the supply voltage rises to 1.8 V after power application at a rate
slower than 0.5 V/ms (MIN.), use of the 2.7 V/1.59 V POC mode is recommended.
The device is in the reset state upon power application and until the supply voltage reaches 1.59 V (TYP.).
It is released from the reset state when the voltage exceeds 1.59 V (TYP.). After that, POC is detected at
1.59 V (TYP.), in the same manner as on power application.
function is used).
switched during the boot swap operation.
set during self-programming or boot swap operation during self-programming (at this time,
1.59 V POC mode (default) is set). However, because the value of 1081H is copied to 0081H
during the boot swap operation, it is recommended to set a value that is the same as that of
0081H to 1081H when the boot swap function is used.
CHAPTER 25 OPTION BYTE
User’s Manual U17260EJ6V0UD
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