GMS36 Datasheet, PDF (106/109 Pages) Hynix Semiconductor – 4-BIT SINGLE CHIP MICROCOMPUTERS

Chapter 9. EPROM
4) Lock Bit Read Mode
26&
9''
 %ORFN
7₃
9_''+
.933
.
.a.
'a'
'
 %ORFN
 [ 7₃
 %ORFN

 %ORFN

 %ORFN

7₉₃₃₆
7₉₃₃₅
9_,+3
7_.6
7_.'
9_''+
7_02'(
0+
0/
5HVHW
/RFN 5HDG 0RGH VHWWLQJ
/RFN ELW 2XWSXW
7_67%
0+  +LJK ELW 0RGH ,QSXW /DWFK
0/  /RZ ELW 0RGH ,QSXW /DWFK
#. Note :
1. Internal system is reset at VPP = 12.5V and K2=`Low`
2. OSC1 is made of a block of 8 x Tp clock.
3. From this time when the reset is released (K2=`High`) , OSC1 clock is counted by 1-bolck.
4. Lock data is outputted from D5 port.
If you set Lock bit, the output data of D5 is always `H`.
9-13