tmp19a43fzxbg TOSHIBA Semiconductor CORPORATION, tmp19a43fzxbg Datasheet - Page 246

• Manufacturer Part Number: tmp19a43fzxbg
• Description: 32bit Tx System Risc
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Timing at which data is
written to the transmit
buffer or shift register
Note 1: When CTS goes High during transmission, the transmitter will stop sending data upon the
Note 2: The transmitter starts sending data at the first falling edge of the TXDCLK clock after the CTS
(8) Transmit controller
TXDCLK
•
•
completion of transmitting the current data item.
signal has been pulled Low.
overrun errors from occurring. This function can be enabled or disabled using SC0MOD<CTSE>.
current data and remains idle until the
generates an INTTX0 interrupt to request the next transmission of data from the CPU and, after
writing the data to the transmit buffer, will wait for the new data to be sent.
the following way: One of the receiver’s ports can be assigned to the function and when the receiver
has finished receiving data, it drives that port High (using the receive interrupt routine), thereby
requesting the transmitter to temporarily suspend transmission.
SIOCLK
Handshaking function
The device has a CTS pin, which makes it possible to transmit data in frame units, preventing
When the
Although the device does not have an RTS pin, the handshaking function can be implemented in
CTS
TXD
In I/O interface mode
In asynchronous (UART) mode
the TXD0 pin one bit at a time at each rising edge of the shift clock output on the SCLK0 pin.
the TXD0 pin one bit at a time, either at each rising edge or each falling edge of the SCLK input
as specified by the setting of SC0CR<SCLKS>.
controller will start transmitting the data at the next rising edge of TXDCLK, thus generating a
transmit shift clock (TXDSFT).
After transmit data has been written to the transmit buffer by the CPU, the transmit
In SCLK output mode (when SC0CR<IOC> = 0), data is output from the transmit buffer to
In SCLK input mode (when SC0CR<IOC> = 1), data is output from the transmit buffer to
Note 1
Figure 3.11.5 Clear to Send ( CTS ) Signal Timing
No transmission
takes place during this period.
CTS
Transmitter
TMP1942
0
Figure 3.11.4 Handshaking Function
pin goes High, the transmitter stops transmission after it has finished sending the
13
CTS
TXD
TMP1942CY/CZ-245
14
15
Note 2
16
CTS
1
0
start bit
pin goes back to Low. The transmit controller
2
3
RXD
RTS (any port)
TMP1942
Receiver
14
TMP1942CY/CZ
15
16
1
2
bit 0
3