µPD703100A-33, 703100A-40, 703101A-33, 703102A-33
6.2 Page ROM Controller (ROMC)
The page ROM controller (ROMC) supports access to ROM (page ROM) that has the page access function.
It compares the address with that of the preceding bus cycle and performs wait control for normal access (off-
page) and page access (on-page). The page ROM controller can support page widths of 8 to 64 bytes.
6.2.1 Features
{ Can be connected directly to 8-bit or 16-bit page ROM
{ For 16-bit bus width, it supports 4-, 8-, 16-, or 32-word page access
For 8-bit bus width, it supports 8-, 16-, 32-, or 64-word page access
{ Enables waits to be set (0 to 7 waits) independently for off-page and on-page access
6.2.2 Page ROM connection
The following figure shows page ROM connection examples.
Figure 6-2. Page ROM Connection Examples (1/2)
(a) 16-Mbit (1 M × 16) page ROM
A1 to A20
D0 to D15
A0 to A19
O1 to O16
RD
OE
CE
CSn
V
DD
WORD/BYTE
16-Mbit (1 M × 16) page ROM
V850E/MS1
Remark n = 0 to 7
25
Preliminary Data Sheet U14168EJ2V0DS00
NEC [ NEC ]
