W90P710_05 Datasheet, PDF (50/526 Pages) Winbond – 16/32-bit ARM microcontroller

W90P710
EXTAL
HCLK
idle _state
pd_state
65536 clocks
wake up by pheripheral's
interrupts
HCLK
(cache)
Case3. IDLE=0, PD=1, MIDLE=0
Fig 7.2.9 Clock management for system power down mode and wake up
7.2.7 Power-On Setting
After power on reset, there are eight Power-On setting pins to configure W90P710 system configuration.
POWER-ON SETTING
Internal System Clock Select
Little/Big Endian Mode Select
Boot ROM/FLASH Data Bus Width
PIN
D15
D14
D [13:12]
Default (Always pull-up in normal operation)
D [11:8]
D15 pin：Internal System Clock Select
If pin D15 is pull-down, the external clock from EXTAL pin is served as internal system clock.
If pin D15 is pull-up, the PLL output clock is used as internal system clock.
D14 pin：Little/Big Endian Mode Select
If pin D14 is pull-down, the external memory format is Big Endian mode.
If pin D14 is pull-up, the external memory format is Little Endian mode.
D [13:12] ： Boot ROM/FLASH Data Bus Width
Pull-down
Pull-down
Pull-up
Pull-up
D [13:12]
Pull-down
Pull-up
Pull-down
Pull-up
BUS WIDTH
8-bit
16-bit
32-bit
RESERVED
- 50 -