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constraints comments describe how to convert

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Jm_n+- notation to connector/cable physical pin
pull/4/head
Emard 6 years ago
parent 8794fd1e36
commit a492e0144f
1 changed files with 7 additions and 0 deletions
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doc/constraints/ulx3s_v20.lpf
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@ -323,6 +323,13 @@ IOBUF PORT "gpdi_sda" PULLMODE=UP IO_TYPE=LVCMOS33 DRIVE=4;
IOBUF PORT "gpdi_scl" PULLMODE=UP IO_TYPE=LVCMOS33 DRIVE=4; IOBUF PORT "gpdi_scl" PULLMODE=UP IO_TYPE=LVCMOS33 DRIVE=4;
# GPIO (default single-ended) "gpio", "ram", "gpdi" sheet # GPIO (default single-ended) "gpio", "ram", "gpdi" sheet
# Physical connector pins:
# *** when FEMALE ANGLED (90 deg PMOD) soldered ***
# Jm_n- = Jm_n, Jm_n+ = Jm_n+1
# example: J1_5- is J1_5 phsyical, J1_5+ is J1_6 physical
# *** when MALE VERTICAL soldered ***
# Jm_n+ = Jm_n, Jm_n- = Jm_n+1
# example: J1_5+ is J1_5 physical, J1_5- is J1_6 physical
# Pins enumerated gp[0-27], gn[0-27]. # Pins enumerated gp[0-27], gn[0-27].
# With differential mode enabled on Lattice, # With differential mode enabled on Lattice,
# gp[] (+) are used, gn[] (-) are ignored from design # gp[] (+) are used, gn[] (-) are ignored from design

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