SAF82532N10V32A Infineon Technologies, SAF82532N10V32A Datasheet - Page 73

• Manufacturer Part Number: SAF82532N10V32A
• Description: IC CONTROLLER 2-CH SER 68-PLCC
• Manufacturer: Infineon Technologies

Specifications of SAF82532N10V32A

• Controller Type: Serial Communications Controller (SCC)
• Interface: Serial
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 8mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Request inventory verification / Request inventory verification
• Other names: SAF82532N10V32A; SAF82532N10V32AIN

Receiver
For some applications it is desirable to provide means of out-of-band flow control to
indicate to the far end transmitter that the local receiver’s buffer is getting full.
This flow control can be used between two DTEs as shown in figure 33 and between a
DTE and a DCE (MODEM) as shown in figure 34 that supports this kind of bi-directional
flow control.
Setting MODE:FRTS = ‘1’ and MODE:RTS = ‘0’ invokes this out-of-band flow control for
the receiver. When the shadow part of RFIFO has reached a set threshold of 28 bytes,
the RTS signal is forced inactive (HIGH). When the shadow part of the RFIFO is empty,
the RTS is re-asserted (‘LOW’). Note that the data is immediately transferred from the
shadow RFIFO to the user accessible RFIFO (as long as there is space available). So
when the shadow RFIFO reaches 28 bytes threshold, there is 4 more byte storage
available before overflow can occur. This allows sufficient time for the far end transmitter
to react to the change in the RTS signal and stop sending more data.
Figure 33 shows the connection between two ESCC2 Version 3.2 devices as DTEs. The
RTS
For example while DTE
the RTS
DTE
control their transmitters. When the shadow RFIFO in DTE
active ‘LOW’ and this signals the far end to resume transmission. Data flow control from
DTE
Figure 33
Out-of-Band DTE-DTE Bi-directional Flow Control
Semiconductor Group
A
B
B
to stop transmitting. Both DTE devices should also be using the CTS signal to flow
to DTE
of DTE
A
signal goes in-active HIGH forcing the CTS
A
A
works in a similar way.
(ESCC2) feeds the CTS
A
is receiving data and its receiver RFIFO threshold is reached,
B
input of the second DTE
73
B
to become in-active indicating to
Asynchronous Serial Mode
A
SAB 82532/SAF 82532
is cleared the RTS
B
(another ESCC2).
A
07.96
goes