st10f272z2 STMicroelectronics, st10f272z2 Datasheet - Page 184

• Manufacturer Part Number: st10f272z2
• Description: 16-bit Mcu With 256 Kbyte Flash Memory And 20 Kbyte Ram
• Manufacturer: STMicroelectronics

Electrical characteristics
Table 84.
1. Maximum Baudrate is in reality 8Mbaud, that can be reached with 64MHz CPU clock and <SSCBR> set to ‘3h’, or with
2. Formula for SSC Clock Cycle time: t
184/189
t
t
317
318
Symbol
48 MHz CPU clock and <SSCBR> set to ‘2h’. When 40 MHz CPU clock is used the maximum baudrate cannot be higher
than 6.6 Mbaud (<SSCBR> = ‘2h’) due to the limited granularity of <SSCBR>. Value ‘1h’ for <SSCBR> may be used only
with CPU clock lower than 32 MHz (after checking that resulting timings are suitable for the master).
Where <SSCBR> represents the content of the SSC Baudrate register, taken as unsigned 16-bit integer.
Minimum limit allowed for t
SR
SR
SSC slave mode timings (continued)
Figure 65. SSC slave timing
1. The phase and polarity of shift and latch edge of SCLK is programmable. This figure uses the leading clock
2. The bit timing is repeated for all bits to be transmitted or received.
Read data setup time before latch
edge, phase error detection off
(SSCPEN = 0)
Read data hold time after latch
edge, phase error detection off
(SSCPEN = 0)
SCLK
MRST
MTSR
edge as shift edge (drawn in bold), with latch on trailing edge (SSCPH = 0b), Idle clock line is low, leading
clock edge is low-to-high transition (SSCPO = 0b).
Parameter
1)
310
is 125 ns (corresponding to 8Mbaud).
t
315
310
t
1st in bit
317
= 4 TCL * (<SSCBR> + 1)
1st out bit
t
310
t
318
t
t
314
315
t
311
(<SSCBR> = 0002h)
2nd out bit
min.
@f
31
2nd in bit
Max. Baudrate
6
t
312
6.6 MBd
CPU
= 40 MHz
t
t
316
313
(1)
max.
)
–
–
2)
2TCL + 6
t
(<SSCBR> = 0001h -
315
min.
Variable Baudrate
Last in bit
t
6
317
Last out bit
FFFFh)
t
318
max.
–
–
ST10F272Z2
Unit
ns
ns