TMC428 ETC-unknow, TMC428 Datasheet - Page 5

• Manufacturer Part Number: TMC428
• Description: Intelligent Triple Stepper Motor Controller With Serial Peripheral Interfaces
• Manufacturer: ETC-unknow

TMC428 DATA SHEET (V. 1.00 / February 12, 2001)
send back from the stepper motor driver chain to the TMC428 are buffered within two 24 bit wide
registers. The micro controller has direct access to these registers. Although, the TMC428 provides
datagrams with up to 64 bits, only the last 48 bits send back from the driver chain are buffered for read
out by the micro controller. This is because buffering of 3 time 16 bits is sufficient for a chain of three
TMC288 stepper motor drivers (see Figure 1) and most other drivers– also from other vendors –sending
back up to 16 bits.
From the user’s point of view, the TMC428 consists of a set of registers, accessed by an micro controller
(µC) via a serial interface in an uniform way. Each time, a µC sends a datagram to the TMC428, it
simultaneously receives a datagram from the TMC428. Each datagram contains all necessary information
to address and to select between read and write for both, the registers and the on-chip memory. This
simplifies the communication with the TMC428 and makes the programming easy. Some micro controllers
have a SPI
of the TMC428. For micro controllers without SPI
sending a 32 bit vector via a serial four wire interface if called, returning that 32 bit vector received from
the TMC428.
Notation of Number Systems
Decimal numbers are used as usual without additional identification. Binary numbers are identified by a
prefixed % character. Hexadecimal numbers are identified by a prefixed $ character. So, for example the
decimal number 42 in the decimal system is written as %101010 in the binary number system, and it is
written as $2A in the hexadecimal number system.
Copyright © 2000, TRINAMIC Microchips GmbH
TRINAMIC
M I C R O C H I P S
TM
hardware interface, which directly connects to the serial four wire micro controller interface
TM
hardware interface one just has to write a subroutine
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