Transition Of Operation Modes - Toshiba TLCS-870/C1 Series Manual

2. CPU Core
2.3 System clock controller
2.3.5.4
(a) Single-clock mode
(b) Dual-clock mode
Note 1: The NORMAL1 and NORMAL2 modes are generically called the NORMAL mode; the SLOW1 and SLOW2 modes are
called the SLOW mode; the IDLE0, IDLE1 and IDLE2 modes are called the IDLE mode; and the SLEEP0 and SLEEP1
are called the SLEEP mode.
Note 2: The mode is released by the falling edge of the source clock selected at TBTCR<TBTCK>.

Transition of operation modes

SYSCR2<TGHA L T > = "1"
SYSCR2<IDLE> = "1"
IDLE0
mode
Interrupt
SYSCR2<XTEN> = "0"
SYSCR2<IDLE> = "1"
IDLE2
mode
Interrupt
SYSCR2<SYSCK> = "0"
SYSCR2<XEN> = "1"
SYSCR2<IDLE> = "1"
SLEEP1
mode
Interrupt
Figure 2-7 Operation Mode Transition Diagram
Warm-up that
IDLE0
follows reset
mode
release
Warm-up completed
(Note 2)
SYSCR1<STOP> = "1"
NORMAL1
mode
STOP mode release
SYSCR2<XTEN> = "1"
SYSCR1<STOP> = "1"
NORMAL2
mode
STOP mode release
SYSCR2<SYSCK> = "1"
SLOW2
mode
SYSCR2<XEN> = "0"
SYSCR1<STOP> = "1"
SLOW1
mode
STOP mode release
SYSCR2<TGHALT> = "1"
(Note 2)
SLEEP0
mode
TMP89FM42
RESET
Reset release
signal
signal
STOP
signal