请高人看看能否写出下面FPGA的结构：
# NB: The timing numbers in this architecture file have been modified
# to comply with our NDA with the foundry providing us with process
# information. The critical path delay output by VPR WILL NOT be accurate,
# as we have intentionally altered the delays to introduce inaccuracy.
# The numbers are still reasonable enough to allow CAD experimentation,
# though. If you want real timing numbers, you'll have to insert your own
# process data for the various, R, C, and Tdel entries.
# A simple architecture.
# All wires span only one logic block, and all routing switches are tri-state
# buffers.
# The logic block is a single 4-LUT + FF.
# Uniform channels. Each pin appears on only one side.
io_rat 2
chan_width_io 1
chan_width_x uniform 1
chan_width_y uniform 1
# 4-input LUT. LUT inputs first, then output, then clock.
inpin class: 0 bottom
inpin class: 0 left
inpin class: 0 top
inpin class: 0 right
outpin class: 1 bottom
inpin class: 2 global top # Clock; shouldn't matter.
# Class 0 is LUT inputs, class 1 is the output, class 2 is the clock.
subblocks_per_clb 1
subblock_lut_size 4
#parameters needed only for detailed routing.
#switch_block_type wilton
#switch_block_type universal
switch_block_type subset
Fc_type fractional
Fc_output 1
Fc_input 1
Fc_pad 1
segment frequency: 1 length: 1 wire_switch: 0 opin_switch: 0 Frac_cb: 1. \
Frac_sb: 1. Rmetal: 4.16 Cmetal: 81e-15
# Switch used as a tri-state buffer within the routing, and also as the
# output buffer used to drive from a CLB output pin to a routing wire.
switch 0 buffered: yes R: 786.9 Cin: 7.512e-15 Cout: 10.762e-15 \
Tdel: 456e-12
# Used only by the area model.
R_minW_nmos 1967
R_minW_pmos 3738
# Timing info below.
C_ipin_cblock 7.512e-15
T_ipin_cblock 1.5e-9
T_ipad 478e-12 # clk_to_Q + 2:1 mux
T_opad 295e-12 # Tsetup
T_sblk_opin_to_sblk_ipin 0 # No local routing
T_clb_ipin_to_sblk_ipin 0 # No local routing
T_sblk_opin_to_clb_opin 0.
# Delays through the BLE (LUT and a FF)
T_subblock T_comb: 546e-12 T_seq_in: 845e-12 T_seq_out: 478e-12
ffice ffice" /> | 
