UPSD3354DV-40U6 Datasheet, PDF (203/272 Pages) STMicroelectronics – fast 8032 MCU with programmable logic

UPSD33xx
PSD module
Table 122. OMC port and data bit assignments
OMC
Port
assignment
(1)(2)
Native Product
terms from AND-
OR array
Maximum
borrowed product
terms
Data bit on 8032
data bus for
loading or reading
OMC
MCELLAB0 Port A0 or B0
3
MCELLAB1 Port A1 or B1
3
MCELLAB2 Port A2 or B2
3
MCELLAB3 Port A3 or B3
3
6
D0
6
D1
6
D2
6
D3
MCELLAB4 Port A4 or B4
3
6
D4
MCELLAB5 Port A5 or B5
3
6
D5
MCELLAB6 Port A6 or B6
3
6
D6
MCELLAB7 Port A7 or B7
3
6
D7
MCELLBC0
Port B0
4
5
D0
) MCELLBC1
Port B1
4
5
D1
t(s ^{MCELLBC2 Port B or C2}
4
5
D2
uc ^{MCELLBC3 Port B3 or C3}
4
5
D3
d _{MCELLBC4 Port B4 or C4}
4
6
D4
ro _MCELLBC5
Port B5
4
6
D5
te ^{P MCELLBC6}
Port B6
4
6
D6
le ^{MCELLBC7 Port B7 orC7}
4
6
D7
o _{1. MCELLAB0-MCELLAB7 can be output to Port A pins only on 80-pin devices. Port A is not available on 52-}
s _{pin devices}
b _{2. Port pins PC0, PC1, PC5, and PC6 are dedicated JTAG pins and are not available as outputs for}
O _{MCELLBC 0, 1, 5, or 6}
Obsolete ^{Product(s) - 27.4.31}
Loading and reading OMCs
Each of the two OMC groups (eight OMCs each) occupies a byte in csiop space, named
MCELLAB and MCELLBC (see Table 123 and Table 124 on page 204). When the 8032
writes or reads these two OMC registers in csiop it is accessing each of the OMCs through
it’s 8-bit data bus, with the bit assignment shown in Table 122 on page 203. Sometimes it is
important to know the bit assignment when the user builds GPLD logic that is accessed by
the 8032. For example, the user may create a 4-bit counter that must be loaded and read by
the 8032, so the user must know which nibble in the corresponding csiop OMC register the
firmware must access. The fitter report generated by PSDsoft Express will indicate how it
assigned the OMCs and data bus bits to the logic. The user can optionally force PSDsoft
Express to assign logic to specific OMCs and data bus bits if desired by using the
‘PROPERTY’ statement in PSDsoft Express. Please see the PSDsoft Express User’s
Manual for more information on OMC assignments.
Loading the OMC flip-flops with data from the 8032 takes priority over the PLD logic
functions. As such, the preset, clear, and clock inputs to the flip-flop can be asynchronously
overridden when the 8032 writes to the csiop registers to load the individual OMCs.
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