IN16C1054
6.2.2 Auto-CTS
Setting EFR[7] to ‘1’ enables Auto-RTS. If enabled, data in TX FIFO are determined to be
transmitted or suspended by the value of CTS#. If ‘0’, it means external UART can
receive new data and data in TX FIFO are transmitted through TXD pin. If ‘1’, it means
external UART can not accept more data and data in TX FIFO are not transmitted. But
data being transmitted by then complete transmission. These procedures are performed
irrespective of FIFO modes. While Auto-CTS is enabled, you can verify the input value of
CTS# by FSR[1]. If ‘0’, CTS# is ‘0’ and it means external UART can accept new data,
If ’1’, CTS# is ‘1’ and it means external UART can not accept more data and data in TX
FIFO are not being transmitted. If IER[7] is set to ‘1’, interrupt is generated by Auto-CTS
when the input of CTS# is changed from ‘0’ to ‘1’, and it is shown on ISR[5:0]. Interrupts
generated by Auto-CTS are removed if MSR is read.
Rev. 00
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