Cypress PSoC CY8CTMG20 Series, Техническое справочное руководство

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PSoC CY8CTMG20x and CY8CTST200 TRM, Document No. 001-53603 Rev. *C 179
Full-Speed USB
20.3.12 PMAx_DR Register
The PSoC Memory Arbiter Data Register (PMAx_DR) is
used to read and write to a particular PMA channel by either
the USB SIE or the M8C. Note that a PMA channel may not
be used simultaneously by both the USB SIE and the M8C.
Bits 7 to 0: Data Byte[7:0]. When the M8C writes to this
register, the PMA registers the byte and then stores the
value at the address in SRAM indicated by the PMAx_WA
register.
After the value has been written to SRAM, the PMAx_WA
register is automatically incremented. When the USB SIE
writes to this register, the PMA registers the byte and then
stores the value in SRAM using the sum of the value of the
PMAx_WA register and the USB SIEs received byte count.
When the M8C reads this register, a pre-loaded value is
returned and the PMAx_RA value is automatically incre-
mented.
The new PMAx_RA value is used to fetch the next value
from the SRAM, to be ready for the next read from the chan-
nel's PMAx_DR register. When the USB SIE reads the
PMAx_DR register, it also receives a pre-loaded value,
which triggers the PMA logic to fetch the next value in
SRAM to be ready for the USB SIEs next read request. In all
read cases, the initial pre-load of the first address of the
channel is triggered by writing the first address of the chan-
nel to the channel's PMAx_RA register. Therefore, the
PMAx_RA register must be written after data has been
stored for the channel.
For additional information, refer to the PMAx_DR register on
page 203 .
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Access
0,58h PMA0_DR Data Byte[7:0] RW : 00
0,59h PMA1_DR Data Byte[7:0] RW : 00
0,5Ah PMA2_DR Data Byte[7:0] RW : 00
0,5Bh PMA3_DR Data Byte[7:0] RW : 00
0,5Ch PMA4_DR Data Byte[7:0] RW : 00
0,5Dh PMA5_DR Data Byte[7:0] RW : 00
0,5Eh PMA6_DR Data Byte[7:0] RW : 00
0,5Fh PMA7_DR Data Byte[7:0] RW : 00
0,64h PMA8_DR Data Byte[7:0] RW : 00
0,65h PMA9_DR Data Byte[7:0] RW : 00
0,66h PMA10_DR Data Byte[7:0] RW : 00
0,67h PMA11_DR Data Byte[7:0] RW : 00
0,68h PMA12_DR Data Byte[7:0] RW : 00
0,69h PMA13_DR Data Byte[7:0] RW : 00
0,6Ah PMA14_DR Data Byte[7:0] RW : 00
0,6Bh PMA15_DR Data Byte[7:0] RW : 00
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