Cypress FM4 Series - Page 654

CHAPTER 12: I/O Port
654 FM4 Peripheral Manual, Doc. No. 002-04856 Rev. *E
[bit4] UEDQME: UEDQME Output Select bit
Selects output for external bus DQM.
bit
Description
Reading
Reads out the register value.
Writing
0
Does not produce output for user external bus MDQM1or MDQM0. [Initial value]
1
Produces output for user external bus MDQM1 and MDQM0.
[bit3] UEWEXE: UEWEXE Output Select bit
Selects output for external bus WEX.
bit
Description
Reading
Reads out the register value.
Writing
0
Does not produce output for user external bus MWEX. [Initial value]
1
Produces output for user external bus MWEX.
[bit2] UECLKE: UECLKE Output Select bit
Selects output for external bus clock.
bit
Description
Reading
Reads out the register value.
Writing
0
Does not produce output for user external bus MCLKOUT. [Initial value]
1
Produces output for user external bus MCLKOUT.
[bit1] UEDTHB: UEDTHB Input/Output Select bit
Selects input/output for external bus data.
bit
Description
Reading
Reads out the register value.
Writing
0
Does not produce output for user external bus WD15 to WD08. [Initial value]
Input of user external bus RD15 to RD08 is connected to the pin.
1
Produces output for user external bus WD15 to WD08.
Input of user external bus RD15 to RD08 is connected to the pin.
[bit0] UEDEFB: UEDEFB Input/Output Select bit
Selects input/output for external bus signal.
bit
Description
Reading
Reads out the register value.
Writing
0
Does not produce output for user external bus MAD07 to MAD01.
Does not produce output for user external bus MCSX0.
Does not produce output for user external bus WD07 to WD00.
Input of user external bus RD07 to RD00 is connected to the pin. [Initial value]
1
Produces output for user external bus MAD07 to MAD01.
Produces output for user external bus MCSX0.
Produces output for user external bus WD7 to WD0.
Input of user external bus RD7 to RD0 is connected to the pin.