FEDL2215-01
Semiconductor
ML2215
1
00000H
007C7H
007C8H
5FFFCH
5FFFDH
5FFFFH
Phrase Control Table Area
User’s Date Area
Test Date Area
Figure 2.1 Mask ROM Address Map
3. Mask Options
The following mask options are available to choose an interfacing type and an external clock frequency, as shown
in Table 3.1.
Table 3.1 Mask Options
Option
Interfacing Type
3-pin Interfacing
3-pin Interfacing
3-pin Interfacing
2-pin Interfacing
2-pin Interfacing
2-pin Interfacing
External Clock Frequency
4.096 MHz
A
B
C
D
E
F
8.192 MHz
16.384 MHz
4.096 MHz
8.192 MHz
16.384 MHz
4. Interfacing Types
Mask option allows a user to select a interfacing type and a frequency of external clock input. Available options
are listed in Table 3.1 below.
4.1 2-pin Controlled Serial Input Interface
2-pin interfacing uses the SD and SI pins to control interfacing. Pull the ST pin down to “L”.
tSDST
SD
SI
NAR
BUSY
Figure 4.1 Timing Chart of Serial Input
As shown in Figure 4.1, serial data input is enabled by entering 1 µsec or longer “L” input (the Start-bit input) to
the SD pin. Serial data input to the SD pin is fetched to the internal register in synchronization with the falling
edge of the SI’s 8th clock as a phrase code for a user-defined phrase.
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OKI [ OKI ELECTRONIC COMPONETS ]
