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TMP93CS41 датащи(PDF) 95 Page - Toshiba Semiconductor

номер детали TMP93CS41
подробное описание детали  CMOS 16-Bit Microcontroller
PDF  248 Pages
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производитель  TOSHIBA [Toshiba Semiconductor]
домашняя страница  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TMP93CS41 датащи(HTML) 95 Page - Toshiba Semiconductor

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TMP93CS40/TMP93CS41
20004-02-10
93CS40-93
3.6.5
Example of Usage
(1) Example of usage -1
Figure 3.6.1 is an example in which an external memory is connected to the
TMP93CS41. In this example, a ROM is connected using a 16-bit bus; a RAM is
connected using an 8-bit bus.
Figure 3.6.1 Example of External Memory Connection (ROM = 16 bits, RAM and I/O = 8 bits)
Resetting sets pins CS0 to CS2 to input port mode. CS0 and CS1 are set high due
to an internal pull-up resistor; CS2 is set low due to an internal pull-down resistor. The
program used to set these pins is as follows.
P4CR
EQU
0EH
P4FC
EQU
10H
B0CS
EQU
68H
B1CS
EQU
69H
B2CS
EQU
6AH
LD
(B0CS), 1X010000B
; CS0
= 8 bits, 2 waits, 7F00H to 7FFFH
LD
(B1CS), 1X011100B
; CS1
= 8 bits, 0 waits, 880H to 7EFFH
LD
(B2CS), 1X000100B
; CS2
= 16 bits, 1 wait, 8000H to 3FFFFFH
LD
(P4CR), XXXXX111B
LD
(P4FC), XXXXX111B
X: Don’t care
CS0
, CS1
, CS2 output mode setting
Upper byte
ROM
TMP93CS41
74HC573
CS0
CS1
CS2
ALE
AD8
AD15
AD0
AD7
RD
WR
D
Q
LE
D
Q
LE
Address Bus
EA
AM8/ AM16
OE
Lower byte
ROM
to
8-bit bus
RAM
8-bit bus
I/O
to
WE
CS
CS
CS
CS
OE
OE
OE WE



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