HMS87C5216 Datasheet, PDF (69/76 Pages) List of Unclassifed Manufacturers – CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER FOR UR(Universal Remocon) & WIRELESS KEYBOARD

HMS87C5216
(5) S/W flow chart example after Reset using SRAM Back-up
RESET
Stack Pointer initialize
Check the SRAM value
(RAM Pattern, Check sum..)
SRAM DATA IS VALID? ^N
Y
Use saved SRAM
value
Clear All Ram area
Figure 17-7 S/W Flow Chart Example for SRAM Back-
up
17.4 Low Voltage Indicator Register (LVIR)
Low Voltage Indication Register (LVIR) is read only Register. It
is useful to display the consumption of Batteries. If VDD power
level is below a cirtain level which is higher than low voltage de-
tection level ( refer to Figure 17-6 ) , The bit of LVIR register
could be set according to the VDD level sequentially. The VDD
dection levels for Indication are two , that is , Bit1 and Bit0 of
LVIR Register. The detection level of Bit0 is higer than Bit1.
bit
7
6
5
4
3
2
1
0
LVIR
-
-
-
-
-
-
LVIR1 LVIR0 _{<00EF h>}
initial value
-
-
-
-
-
-
0
0
R/W
-
-
-
-
-
-
R
R
SEP. 2004 Ver 1.01