STM32W108CZ STMicroelectronics, STM32W108CZ Datasheet - Page 92
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STM32W108CZ
Manufacturer Part Number
STM32W108CZ
Description
High-performance, IEEE 802.15.4 wireless system-on-chip with embedded Flash memory
Manufacturer
STMicroelectronics
Datasheet
1.STM32W108CC.pdf
(232 pages)
Specifications of STM32W108CZ
Receive Current (w/ Cpu)
27 mA
Transmit Current (w/ Cpu, +3 Dbm Tx)
31 mA
Low Deep Sleep Current, With Retained Ram And Gpio
400 nA/800 nA with/without sleep timer
Standard Arm Debug Capabilities
Flash patch & breakpoint; data watchpoint & trace; instrumentation trace macrocell
Single Voltage Operation
2.1-3.6 V with internal 1.8 V and 1.25 V regulators
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Serial interfaces
9.6.3
Table 51.
1. The notation xxx means that the corresponding column header below is inserted to form the field name.
92/232
FLOW
0
1
1
SC1_UARTxxx
SC1_UARTCFG
AUTO
0
1
-
RTS/CTS flow control
RTS/CTS flow control, also called hardware flow control, uses two signals (nRTS and nCTS)
in addition to received and transmitted data (see
receiver to prevent buffer overflow, by signaling an external device when it is and is not
allowed to transmit.
Figure 14. RTS/CTS flow control connections
The UART RTS/CTS flow control options are selected by the SC1_UARTFLOW and
SC1_UARTAUTO bits in the SC1_UARTCFG register (see
SC1_UARTFLOW bit is set, the UART will not start transmitting a character unless nCTS is
low (asserted). If nCTS transitions to the high state (deasserts) while a character is being
transmitted, transmission of that character continues until it is complete.
If the SC1_UARTAUTO bit is set, nRTS is controlled automatically by hardware: nRTS is put
into the low state (asserted) when the receive FIFO has room for at least two characters,
otherwise is it in the high state (unasserted). If SC1_UARTAUTO is clear, software controls
the nRTS output by setting or clearing the SC1_UARTRTS bit int the SC1_UARTCFG
register. Software control of nRTS is useful if the external serial device cannot stop
transmitting characters promptly when nRTS is set to the high state (deasserted).
UART RTS/CTS flow control configurations
(1)
RTS
0/1
-
-
nCTS, nRTS
nCTS, nRTS
TXD, RXD,
TXD, RXD,
Pins used
TXD, RXD
UART Transmitter
UART Receiver
STM32W108
STM32W108HB STM32W108CC STM32W108CB STM32W108CZ
No RTS/CTS flow control
Flow control using RTS/CTS with software control of nRTS:
nRTS controlled by SC1_UARTRTS bit in SC1_UARTCFG register
Flow control using RTS/CTS with hardware control of nRTS:
nRTS is asserted if room for at least 2 characters in receive FIFO
Doc ID 16252 Rev 13
RXD
nRTS
TXD
nCTS
Figure
Operating mode
nCTS
nRTS
RXD
TXD
14). Flow control is used by a data
Table
UART Transmitter
UART Receiver
Other Device
51). Whenever the
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