u3745bm ATMEL Corporation, u3745bm Datasheet - Page 21

• Manufacturer Part Number: u3745bm
• Description: Receiver
• Manufacturer: ATMEL Corporation

Figure 18. Generation of the Power-on Reset
Figure 19. Timing of the Register Programming
Programming the
Configuration Register
4663A–RKE–06/03
DATA (U3745BM)
Serial bi-directional
data line
Out1 (mC)
V
POR
DATA (U3745BM)
S
Receiver
on
X
X
X
t1
t
Rst
•
By means of that mechanism, the receiver cannot lose its register information without
communicating that condition via the reset marker RM.
The configuration registers are programmed serially via the bi-directional data line
according to Figure 19 and Figure 20.
t2
If the receiver is set back to polling mode via pin DATA, RM cannot be canceled by
accident if t1 is applied according to the proposal in the section “Programming the
Configuration Registers”.
t3
(Start bit)
t4
Bit 1
("0")
t5
t6
t7
V
ThReset
(Register
select)
Bit 2
("1")
Programming Frame
Bit 13
("0")
(Poll8)
1 / f
RM
(Poll8R)
Bit 14
("1")
U3745BM
t8
t9
T
Sleep
Startup
mode
X
X
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