Cpu And Memory - Oki OKIPAGE 8p Maintenance Manual

3.2

CPU and Memory

(1) CPU (NKK3 or NKK5)
CPU core
CPU clock
Data bus width
(2) Program ROM
ROM capacity
ROM type
Access time
(3) Resident RAM
RAM capacity
RAM type
Access time
(4) Option Board
RAM capacity
RAM type
Access time
The block diagram of CPU and memory circuit is shown in Fig. 3-2.
RISC CPU (MIPS R3000)
7.067 MHz, Internal CPU CLK 28.268 MHz
External 16 bits, Internal 32 bits
8M-bytes (Mask ROM)
64Mbits (4M x 16 bits)
100 nsec
2M bytes (1Mx 16 bits)
16M bits (1M x 16 bits)
60 ns
4M bytes (16M bits D-RAM two pieces)
16M bits D-RAM two pieces
60 n
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