Cypress enCoRe V CY7C643 Series, Technical Reference Manual

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enCoRe™ V CY7C643xx, enCoRe™ V LV CY7C604xx TRM, Document No. 001-32519 Rev *H 156
Full-Speed USB
20.3.13 PMAx_RA Register
The PSoC Memory Arbiter Read Address Register
(PMAx_RA) is used to set the beginning address for the
PMA channel. A PMAx_RA register address uses the same
physical register as the PMAx_WA register address. There-
fore, when the read address is changed, the write address is
also changed and the PMAx_WA and PMAx_RA registers
always return the same value when read. When a
PMAx_RA register is written, the address is stored and the
value of the corresponding SRAM address is loaded into the
channel's PMAx_DR. Therefore, this register must only be
written after valid data is stored in SRAM for the channel. Bits 7 to 0: Address[7:0]. The value returned when this
register is read depends on whether the PMA channel is
being used by the USB SIE or by the M8C. In the USB SIE
case, this register always returns the beginning SRAM
address for the PMA channel. In the M8C case, this register
always returns the next SRAM address that is used by the
PMA channel, if a byte is read from the channel's data regis-
ter (PMAx_DR) by the M8C.
For additional information, refer to the PMAx_RA register on
page 217 .
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Access
1,3Ch PMA0_RA Read Address[7:0] RW : 00
1,3Dh PMA1_RA Read Address[7:0] RW : 00
1,3Eh PMA2_RA Read Address[7:0] RW : 00
1,3Fh PMA3_RA Read Address[7:0] RW : 00
1,40h PMA4_RA Read Address[7:0] RW : 00
1,41h PMA5_RA Read Address[7:0] RW : 00
1,42h PMA6_RA Read Address[7:0] RW : 00
1,43h PMA7_RA Read Address[7:0] RW : 00
1,4Ch PMA8_RA Read Address[7:0] RW : 00
1,4Dh PMA9_RA Read Address[7:0] RW : 00
1,4Eh PMA10_RA Read Address[7:0] RW : 00
1,4Fh PMA11_RA Read Address[7:0] RW : 00
1,50h PMA12_RA Read Address[7:0] RW : 00
1,51h PMA13_RA Read Address[7:0] RW : 00
1,52h PMA14_RA Read Address[7:0] RW : 00
1,53h PMA15_RA Read Address[7:0] RW : 00