DF2211NP24V Renesas Technology / Hitachi Semiconductor, DF2211NP24V Datasheet - Page 500

• Manufacturer Part Number: DF2211NP24V
• Description: H8S/2200 Series, 2212 Group, USB, RTC, HSS TNP-64B; Vcc= 2.7 to 3.6 volts, Temp= -20 to 75 C; Package: PVQN0064LB-A
• Manufacturer: Renesas Technology / Hitachi Semiconductor

• Reception
Rev.7.00 Dec. 24, 2008 Page 446 of 698
REJ09B0074-0700
Receive operation should be stopped (by clearing RE to 0) before making a module stop mode,
software standby mode, watch mode, subactive mode, or subsleep mode transition. RSR, RDR,
and SSR are reset. If a transition is made without stopping operation, the data being received
will be invalid.
To continue receiving without changing the reception mode after the relevant mode is cleared,
set RE to 1 before starting reception. To receive with a different receive mode, the procedure
must be started again from initialization.
Figure 12.42 shows a sample flowchart for mode transition during reception.
Read receive data in RDR
Figure 12.42 Sample Flowchart for Mode Transition during Reception
Read RDRF flag in SSR
Transition to software
<Start of reception>
standby mode, etc.
standby mode, etc.
Exit from software
operating mode?
<Reception>
Yes
Initialization
RDRF = 1
Yes
Change
RE = 0
No
No
RE = 1
[1]
[2]
[1]
[2]
Receive data being received becomes invalid.
Includes module stop mode, watch mode,
subactive mode, and subsleep mode.