em78p156n ELAN Microelectronics Corp, em78p156n Datasheet - Page 57

• Manufacturer Part Number: em78p156n
• Description: 8-bit Micro-controller
• Manufacturer: ELAN Microelectronics Corp

Symbol
Tpor
Tvd
Tvr
* Tvd is the period of Vdd voltage less than POR voltage.
** Tvr is the period of Vdd voltage higher than 5.5 volts.
Address Trap Detect
An address trap detect is one of the fail-safe function that detects CPU malfunction caused by noise or the like.
If the CPU attempts to fetch an instruction from a part of RAM, an internal recovery circuit will auto started. Until
CPU got the correct function, it will execute the following program.
This specification is subject to change without prior notice.
Power
on
Internal
POR
/Rese
Vdd
Parameter
Power on reset time
Vdd Voltage drop time
Vdd Voltage rise time
Tpor
Condition
Vdd = 5V, -40¢ J to 85¢ J
Vdd = 5V, -40¢ J to 85¢ J
Vdd = 5V, -40¢ J to 85¢ J
57
Tvd
10.5
Min.
-
-
Typ.
16.8
-
-
EM78P156N
Tvr
OTP ROM
07.29.2004 (V1.2)
Max.
1**
22
1*
Unit
ms
us
us