UPSD3212A Datasheet, PDF (82/163 Pages) STMicroelectronics – Flash Programmable System Devices with 8032 MCU with USB and Programmable Logic

uPSD3212A, uPSD3212C, uPSD3212CV
The USCL 8-bit Prescaler Register for USB is at
E1h. The USCL should be loaded with a value that
results in a clock rate of 6MHz for the USB using
the following formula:
USB clock input =
(f_OSC / 2) / (Prescaler register value +1)
Where f_OSC is the MCU clock input frequency.
Note: USB works ONLY with the MCU Clock fre-
quencies of 12, 24, or 36MHz. The Prescaler val-
ues for these frequencies are 0, 1, and 2.
Table 77. USB SFR Memory Map
SFR Reg
Addr Name
7
6
Bit Register Name
5
4
3
2
1
0
Reset
Value
Comments
E1 USCL
8-bit
00 Prescaler for
USB logic
E6 UDT1
UDT1.7 UDT1.6 UDT1.5 UDT1.4 UDT1.3 UDT1.2 UDT1.1 UDT1.0
00
USB Endpt1
Data Xmit
E7 UDT0
UDT0.7 UDT0.6 UDT0.5 UDT0.4 UDT0.3 UDT0.2 UDT0.1 UDT0.0
00
USB Endpt0
Data Xmit
E8 UISTA SUSPND —
RSTF
TXD0F RXD0F RXD1F
USB
EOPF RESUMF 00 Interrupt
Status
USB
E9 UIEN SUSPNDIE RSTE RSTFIE TXD0IE RXD0IE TXD1IE EOPIE RESUMIE 00 Interrupt
Enable
EA UCON0 TSEQ0 STALL0 TX0E
RX0E
TP0SIZ3 TP0SIZ2 TP0SIZ1 TP0SIZ0
00
USB Endpt0
Xmit Control
EB UCON1 TSEQ1 EP12SEL
—
FRESUM TP1SIZ3 TP1SIZ2 TP1SIZ1 TP1SIZ0
00
USB Endpt1
Xmit Control
EC UCON2 —
—
—
SOUT
EP2E
EP1E
STALL2 STALL1
00
USB Control
Register
ED USTA RSEQ SETUP IN
OUT
RP0SIZ3 RP0SIZ2 RP0SIZ1 RP0SIZ0
00
USB Endpt0
Status
EE UADR USBEN UADD6 UADD5 UADD4 UADD3 UADD2 UADD1 UADD0
USB
00 Address
Register
EF UDR0
UDR0.7 UDR0.6 UDR0.5 UDR0.4 UDR0.3 UDR0.2 UDR0.1 UDR0.0
00
USB Endpt0
Data Recv
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