ST STM32H723ZG User Manual

Pin External component Comment
OSC32_IN
Typical example
(1)
:
Crystal: 32.768 kHz (6 pF, 50 KΩ)
Capacitor: 2x 1.5 pF
All components to be placed as close
as possible from the pins
LSE oscillator input (see Figure 11. HSE/LSE clock
source) .
OSC32_OUT
LSE oscillator output
The external cap must be tuned because it is strongly
dependent on the PCB design.
Unconnected in bypass Not used in bypass mode.
OSC_IN
External clock input
HSE oscillator
HSE bypass input 4 MHz ≤ f ≤ 50 MHz.
Typical example
(1)
:
Crystal: 24 MHz (6 pF, 80 Ω)
Capacitor: 2x 33 pF
All components to be placed as close
as possible from the pins
HSE oscillator input (see Figure 11. HSE/LSE clock
source) .
OSC_OUT
HSE oscillator output
The external cap must be tuned because it is strongly
dependent on the PCB design.
Unconnected in bypass Not used in bypass mode.
I2S_CKIN External clock input
External kernel clock input for audio interface SAI, DFSDM,
I2S
When an external clock reference is needed.
USB_PHY External clock input
USB clock provided by the external PHY
The embedded PHY supports FS
For HS an external PHY needs to be used.
ETH_MII_TX_CLK/
ETH_MII_RX_CLK/
ETH_RMII_REF_CLK
External clock input
Ethernet transmit and receive clock provided from an
external Ethernet PHY
MCO1 Internal clock output
Some internal clocks can be provided to MCO1 pin.
An embedded divider allows frequency reduction
See Figure 10. Clock generation and clock tree.
MCO2 Internal clock output
Some internal clocks can be provided to MCO2 pin.
An embedded divider allows frequency reduction
See Figure 10. Clock generation and clock tree.
SYNC External sync signal
Synchronization source for the HSI48MHz embedded
oscillator Clock Recovery System (CRS)
One of the three possible sync signal, see the reference
manual STM32H723/733, STM32H725/735 and
STM32H730 advanced Arm
®
-based 32-bit MCUs
(RM0468).
.
1. Oscillator design guide for STM8S, STM8A and STM32 microcontrollers application note (AN2867)
AN5419
Introduction
AN5419 - Rev 2
page 20/50

ST STM32H723ZG Specifications

General

Brand	ST
Model	STM32H723ZG
Category	Microcontrollers
Language	English