參數(shù)資料
型號： MC72000
廠商： 飛思卡爾半導體(中國)有限公司
英文描述： Integrated Bluetooth Radio
中文描述： 集成藍牙無線
文件頁數(shù)： 83/156頁
文件大?。?/td> 1782K
代理商： MC72000
MOTOROLA
MC72000
Advance Information Data Sheet
Go to: www.freescale.com
83
7.4.5 Memory Map and Registers
7.4.5.1 SSI Memory Map
Table 39 shows the SSI memory map. Note there are four registers that are not accessible.
All registers in the SSI are 16-bit accessible only.
7.4.5.2 Register Descriptions
The following sections describe the SSI registers.
7.4.5.2.1
SSI Transmit Data Register (STX)
The STX register is a 16-bit, read-write register. Data to be transmitted is written into this register. If the
transmit FIFO is enabled, data is transferred from this register to the transmit FIFO register when the FIFO
can accommodate the data. Otherwise, data written to this register is transferred to the transmit shift register
(TXSR) when shifting of previous data is completed. The data written occupies the most significant portion
of the STX register. The unused bits (least significant portion) of the STX register are ignored.
If the transmit interrupt is enabled, the interrupt is asserted when the STX register becomes empty (TDE=1).
If the transmit FIFO is also enabled, the transmit FIFO must be below its watermark for the interrupt to
assert.
NOTE:
Enable SSI (SSIEN=1) before writing to STX.
Table 39. SSI Memory Map
Address
Reg Name
Description
Base + 0x00
—
—
Base + 0x02
—
—
Base + 0x04
Base + 0x06
Base + 0x08
Base + 0x0A
Base + 0x0C
Base + 0x0E
Base + 0x10
Base + 0x12
Base + 0x14
Base + 0x16
Base + 0x18
Base + 0x1A
Base + 0x1C
SSI Transmit Data Register (STX)
SSI Transmit FIFO Register (TXFIFO)
SSI Transmit Shift Register (TXSR)
SSI Receive Data Register (SRX)
SSI Receive FIFO Register (RXFIFO)
SSI Receive Shift Register (RXSR)
SSI Control/Status Register (SCSR)
SSI Control Register 2 (SCR2)
SSI Transmit Control Register (STXCR)
SSI Receive Control Register (SRXCR)
SSI Time Slot Register (STSR)
SSI FIFO Control/Status Register (SFCSR)
SSI Test Register (STR)
SSI Option Register (SOR)
SSI Transmit Slot Mask A (TSMA)
SSI Transmit Slot Mask B (TSMB)
SSI Receive Slot Mask A (RSMA)
SSI Receive Slot Mask B (RSMB)
SSI Frame Status Register (SFSR)
write only
read only
lower byte read-only
write only
read only
F
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