ST92F120V1Q7 STMicroelectronics, ST92F120V1Q7 Datasheet - Page 181

• Manufacturer Part Number: ST92F120V1Q7
• Description: Microcontrollers (MCU) Flash 128K SPI/I2C
• Manufacturer: STMicroelectronics

Specifications of ST92F120V1Q7

• Data Bus Width: 8 bit, 16 bit
• Program Memory Type: Flash
• Program Memory Size: 128 KB
• Data Ram Size: 4 KB
• Interface Type: I2C, SPI
• Maximum Clock Frequency: 24 MHz
• Number Of Programmable I/os: 77
• Number Of Timers: 5
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Package / Case: PQFP-100
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 16 Channel
• Lead Free Status / Rohs Status: No

MULTIPROTOCOL SERIAL COMMUNICATIONS INTERFACE (Cont’d)
10.5.4 SCI-M Operating Modes
10.5.4.1 Asynchronous Mode
In this mode, data and clock can be asynchronous
(the transmitter and receiver can use their own
clocks to sample received data), each data bit is
sampled 16 times per clock period.
The baud rate clock should be set to the ÷16 Mode
and the frequency of the input clock (from an ex-
ternal source or from the internal baud-rate gener-
ator output) is set to suit.
Figure 90. Sampling Times in Asynchronous Format
SDIN
rcvck
rxclk
LEGEND:
SIN:
rcvck:
rxd:
rxclk:
rxd
Serial Data Input line
Internal X16 Receiver Clock
Internal Serial Data Input Line
Internal Receiver Shift Register Sampling Clock
0
MULTIPROTOCOL SERIAL COMMUNICATIONS INTERFACE (SCI-M)
1
2
3
4
5
10.5.4.2
Synchronous Clock
In this mode, data and clock are synchronous,
each data bit is sampled once per clock period.
For transmit operation, a general purpose I/O port
pin can be programmed to output the CLKOUT
signal from the baud rate generator. If the SCI is
provided with an external transmission clock
source, there will be a skew equivalent to two
INTCLK periods between clock and data.
Data will be transmitted on the falling edge of the
transmit clock. Received data will be latched into
the SCI on the rising edge of the receive clock.
7
8
9
Asynchronous
10
11
12
13
14
Mode
15
VR001409
181/324
with
9