HD4046212RFS datasheet(44/157 Pages) RENESAS

tên linh kiện	HD4046212RFS

Giải thích chi tiết về linh kiện	AS Microcomputer Incorporating a DTMF Generator Circuit

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HD404629R Series

Notes: 1. When watch or subactive mode on HD404629R Series/HD4074629 is used and the LCD

function is off in that mode, the watch mode or subactive mode current is larger, and

consequently the following settings should be made.

Perform the following writes in the order shown before the transition to watch mode (before

execution of the STOP instruction):

Write $0 to LCR

Write $3 to LMR

Also, when returning to active mode from watch mode or subactive mode, perform the

following writes in the order shown:

Write a value appropriate to the conditions of use to LMR

Write a value appropriate to the conditions of use to LCR

A sample programming flowchart for the above procedures is shown in figure 23.

LMR

LCR

Initialization routine

Include these

operations

LCR = $0

LMR = $3

Main routine

STOP instruction

Watch mode

Or transition to

subactive mode

LMR

LCR

Set

appropriate

values for

active mode

INT or timer A

interrupt processing

routine

After the MCU enters active mode again

Set

appropriate

values for

active mode

Figure 23 Programming Flowchart (LCD Display Off in Watch or Subactive Mode)

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