BC7601 Datasheet, PDF (10/16 Pages) Holtek Semiconductor Inc – BLE Transparent Transmission Controller

BC7601/BC7602
UART Interface
The UART interface supports hardware flow control
signals, RTS and CTS, with the following features.
• 16 byte transmit and receive FIFOs
• Hardware flow control support (CTS/RTS)
• 8 data bits per character
• Programmable serial data baud rate from 2400 to
256000
• Connect CTS to VSS when flow control is not used
Pin Name
In/Out
UART Description
UART_RTS
Out UART required to send
UART_RXD
In
UART RX data
UART_TXD
Out UART TX data
UART_CTS
In
UART clear to send
Note: The SPI-UR_N pin is pulled low during power-on
period.
Table 4. UART Pin Function
I²C Interface
The IIC_SDA, IIC_SCL pins can be used as the I²C
interface when the IIC_SDA line is pulled high.
Sleep and Wake-up
The WAKEUP pin is used to select the device
operation mode while the STATE pin is used to
indicate the device operation status. The external host
controller can check the device operation mode by
monitoring the STATE pin. When the WAKEUP pin
is pulled low, the device will enter the Sleep mode
and the STATE pin will go low. If the device is in the
Sleep Mode, it can be woken up using the WAKEUP
pin. When the WAKEUP pin is pulled high, the device
will be woken up and the STATE pin will go high.
When the device enters the Sleep Mode, the external
master SPI request can also wake up the device. If a
high-to-low signal appears on the SPI_CS pin in the
Sleep Mode, the device will be woken up and respond
to the external host request. After the external master
SPI access requests have been served, the device may
stay in the operating mode or enter the Sleep Mode
again depending upon the WAKEUP pin status.
Power Down Mode
The PDN pin is used to power down the device. If the
PDN pin is pulled low, the device will enter the power
down mode and all internal clocks will be disabled.
After the device has been powered down, there is
only one way to reactivate the device which is to reset
the device by pulling the RST_N pin low and then re-
initialising the device.
External Interrupt
The devices provide an INT_EXT pin to output the
interrupt signal to an external microcontroller. If the
INT_EXT pin status is low, this means that the valid
data is ready.
Rev. 1.10
10
May 19, 2017