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5-3. Digital to Analog Converter (PCM55HP)
16-bit digital to analog converter. Also, together with comparator and CPU A, it is used as analog to
digital converter.
Data
inputs
Zener
Voltage
Bit 1 (MSB)
Bit 2
Bits
Bit 4
Bits
Bit6
OON
OMRON
+
16-Bit
:
Bit
Resistor
Biro
Network
Bit 10
And
Bit 14
Switches
Bit 12
5-4. RAM (HM65256BLFP)
As
Al4
256K bit static RAM for data buffer for CPU A.
OE/(RFSH)
E WE
Refresh
Basic
Oscillation
Refresh
= Internal clock
address
voltage
<
'
control
'generator
counter
generator
circuit
circuit
circuit
1/0 buffer;
eee
buffer
Raw
address
o
Go
3
Memory sell array
:
fesse
8
ea
=
oe
wc
:
7
a
[0
bus
bus
§
LJ
am
||
o1/01
01/02
1/03
01/04
O1/05
01/06
O1/07
o1/0e8
PCMS55-Flatpak: [PJ PCMS55-Flatpak
Bit 13
Bit 14
Bit 15
Bit 16
Voltage Output
Feedback Resistor
Summing Junction
Common
Current Output
Bipolar Offset
+ Vee
- Veo
31
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