TMP86C993XB Toshiba, TMP86C993XB Datasheet - Page 42
TMP86C993XB
Manufacturer Part Number
TMP86C993XB
Description
EMULATION CHIP FOR TMP86F SSOP
Manufacturer
Toshiba
Datasheet
1.TMP86C993XB.pdf
(246 pages)
Specifications of TMP86C993XB
Accessory Type
Adapter
For Use With/related Products
TMP86F SSOP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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2.2
System Clock Controller
Example :Switching from the SLOW1 mode to the NORMAL2 mode (fc = 16 MHz, warm-up time is 4.0 ms).
PINTTC4:
VINTTC4:
(2)
(Warm up) has been taken by the timer/counter (TC4,TC3), clear SYSCR2<SYSCK> to switch the
main system clock to the high-frequency clock.
the operation mode is started from NORMAL1 mode.
Note:After SYSCR2<SYSCK> is cleared to 0, instructions are executed continuously by the low-fre-
Switching from SLOW1 mode to NORMAL2 mode
First, set SYSCR2<XEN> to turn on the high-frequency oscillation. When time for stabilization
SLOW mode can also be released by inputting low level on the RESET pin. After releasing reset,
SET
LD
LD
LD
DI
SET
EI
SET
:
CLR
CLR
RETI
:
DW
quency clock during synchronization period for high-frequency and low-frequency clocks.
High-frequency clock
Low-frequency clock
Main system clock
SYSCK
(SYSCR2). 7
(TC3CR), 63H
(TC4CR), 05H
( TTREG4), 0F8H
(EIRH). 7
(TC4CR). 3
(TC4CR). 3
(SYSCR2). 5
PINTTC4
Page 28
; SYSCR2<XEN> ← 1 (Starts high-frequency oscillation)
; Sets mode for TC4, 3 (16-bit mode, fc for source)
; Sets warming-up counter mode
; Sets warm-up time
; IMF ← 0
; Enables INTTC4
; IMF ← 1
; Starts TC4, 3
; Stops TC4, 3
; SYSCR2<SYSCK> ← 0
; (Switches the main system clock to the high-frequency clock)
; INTTC4 vector table
TMP86FH92DMG
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