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TMP91CP27 bảng dữ liệu(PDF) 21 Page - Toshiba Semiconductor

tên linh kiện TMP91CP27
Giải thích chi tiết về linh kiện  Original CMOS 16-Bit Microcontroller
PDF  246 Pages
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nhà sản xuất  TOSHIBA [Toshiba Semiconductor]
Trang chủ  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TMP91CP27 bảng dữ liệu(HTML) 21 Page - Toshiba Semiconductor

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TMP91CP27
2003-11-05
91CP27-19
Example 2:
Setting the clock
Changing from low frequency (fs) to high frequency (fc).
SYSCR0
EQU
00E0H
SYSCR1
EQU
00E1H
SYSCR2
EQU
00E2H
LD
(SYSCR2), X
−10− −X−B
;
Sets warm-up time to 2
P
14
P
/fc.
SET
7, (SYSCR0)
;
Enables high-frequency oscillation.
SET
2, (SYSCR0)
;
Clears and starts warm-up timer.
WUP:
BIT
2, (SYSCR0)
;
JR
NZ, WUP
;
Detects stopping of warm-up timer.
RES
3, (SYSCR1)
;
Changes f
BBBBBBBBBBBBBBBBBBBBBBBBB
SYS
BBBBBBBBBBBBBBBBBBBBBBBBB
from fs to fc.
RES
6, (SYSCR0)
;
Disables low-frequency oscillation.
X: Don’t care,
−: No change
<XEN>
X1 and X2 pins
XT1 and XT2 pins
<XTEN>
Warm-up timer
End of warm-up timer
<SYSCK>
System clock f
B
SYS
B
Enables
high-frequency
Clears and starts
warm-up timer
End of warm-up
timer
Chages f
B
SYS
B
from fs to fc
Disables
low-frequency
fc
fs
Counts up by f
B
OSCH
B



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