ATAM862P-TNSY3D Atmel, ATAM862P-TNSY3D Datasheet - Page 77
ATAM862P-TNSY3D
Manufacturer Part Number
ATAM862P-TNSY3D
Description
IC MCU FLASH 4K TX 315MHZ 24SSOP
Manufacturer
Atmel
Datasheet
1.ATAM862P-TNQY3D.pdf
(110 pages)
Specifications of ATAM862P-TNSY3D
Applications
UHF ASK/FSK
Core Processor
MARC4
Program Memory Type
FLASH (4 kB)
Controller Series
MARC4 4-Bit
Ram Size
256 x 4
Interface
SSI
Number Of I /o
11
Voltage - Supply
1.8 V ~ 4 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
24-SSOP
Processor Series
ATAM862x
Core
MARC4
Data Bus Width
4 bit
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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23.8.6
23.8.7
4554F–4BMCU–07/07
8-bit Pseudo MCL Mode
MCL Bus Protocol
Figure 23-20. Example of MCL Receive Dialog
In this mode, the SSI exhibits all the typical MCL operational features except for the acknowl-
edge bit which is never expected or transmitted.
The MCL protocol constitutes a simple 2-wire bi-directional communication highway via which
devices can communicate control and data information. Although the MCL protocol can support
multi-master bus configurations, the SSI in MCL mode is intended for use purely as a master
controller on a single master bus system. So all reference to multiple bus control and bus con-
tention will be omitted at this point.
All data is packaged into 8-bit telegrams plus a trailing handshaking or acknowledge bit. Nor-
mally the communication channel is opened with a so-called start condition, which initializes all
devices connected to the bus. This is then followed by a data telegram, transmitted by the mas-
ter controller device. This telegram usually contains an 8-bit address code to activate a single
slave device connected onto the MCL bus. Each slave receives this address and compares it
with its own unique address. The addressed slave device, if ready to receive data, will respond
by pulling the SD line low during the 9th clock pulse. This represents a so-called MCL acknowl-
edge. The controller detecting this affirmative acknowledge then opens a connection to the
required slave. Data can then be passed back and forth by the master controller, each 8-bit tele-
gram being acknowledged by the respective recipient. The communication is finally closed by
the master device and the slave device put back into standby by applying a stop condition onto
the bus.
(IFN = 0)
(IFN = 1)
Interrupt
Interrupt
SRDY
ACT
SDD
SIR
SD
SC
Write STB
(tx data 1)
Start
msb
7 6 5 4 3 2 1
tx data 1
lsb
0 A
msb
7 6 5 4 3 2 1 0 A
rx data 2
lsb
ATAM862-3
Stop
Read SRB
(rx data 2)
77
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