DS07-16303-3E Datasheet, PDF (56/97 Pages) Fujitsu Component Limited. – 32-bit RISC Microcontroller CMOS FR30 Series

MB91121
• Block diagram
X0
Oscillator
X1
circuit
Internal
interrupt request
Internal reset
CPU hold enable
HST pin
DMA
request
Power on sel
RST pin
[Gear control block]
Gear control register (GCR)
PCTR register
CPU gear
Peripheral
gear
PLL
1/2
Internal clock
generation
circuit
[Stop/sleep control block]
CPU clock
Internal bus clock
External bus clock
Peripheral DMA clock
DSP Macros clock
Internal
peripheral clock
Standby control
register (STCR)
Status
transition
control circuit
[DMA prohibit circuit]
DMA request prohibit
register (PDRR)
[Reset cause circuit]
Reset
generation
F/F
STOP state
SLEEP state
CPU hold request
Internal reset
Reset cause register (RSRR)
[Watchdog control block]
Watchdog reset generation
postpone register (WPR)
Timebase timer clear
register (CTBR)
Watchdog reset
postpone register
Timebase timer
Count clock
56