tmp86fh46bng TOSHIBA Semiconductor CORPORATION, tmp86fh46bng Datasheet - Page 45

• Manufacturer Part Number: tmp86fh46bng
• Description: 8 Bit Microcontroller Tlcs-870/c Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Example :Switching from the SLOW1 mode to the NORMAL2 mode (fc = 16 MHz, warm-up time is 4.0 ms).
PINTTC4:
VINTTC4:
(2)
First, set SYSCR2<XEN> to turn on the high-frequency oscillation. When time for stabilization (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.
SLOW mode can also be released by inputting low level on the RESET pin. After releasing reset, the operation mode is star-
ted 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
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). 1
(TC4CR). 3
(TC4CR). 3
(SYSCR2). 5
PINTTC4
Page 27
; 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
TMP86FH46BNG