FEDL63187B-06
1Semiconductor
ML63187B/63189B
MASK OPTION
In the ML63187B and ML63189B use the mask option to specify the following functions:
• Low-Speeed clock oscillation circuit
Specify the crystal oscillation circuit or the RC oscillation circuit for the low-speed clock oscillation
circuit.
• Reset signal sampling
Specify whether or not the reset signal will be sampled at 2 kHz.
When specifying “will carry out 2 kHz sampling,” hold the RESET pin at a “H” level for 1 ms or more.
To use the mask option, assign mask option data in the application program in accordance with the formats below.
The mask option area for each device is an application program execution disabled area.
Mask Option Data Assignment Format
Function
Mask option area bit data
Option to be selected
Crystal oscillation circuit
0
Low-speed clock oscillation circuit
(crystal oscillation circuit/RC oscillation circuit)
Reset signal sampling
ML63187B:3FE0H bit 0
1
RC oscillation circuit
0
Will carry out 2 kHz sampling
Will not carry out 2 kHz sampling
ML63189B:7FE0H bit 1
1
(will/will not carry out 2 kHz sampling)
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