TSS901E_07 ATMEL Corporation, TSS901E_07 Datasheet - Page 7

• Manufacturer Part Number: TSS901E_07
• Description: Triple Point to Point IEEE 1355 High Speed Controller
• Manufacturer: ATMEL Corporation

Register Set
Access by HOCI: HOCI Data Transfer
4167F–AERO–06/07
This chapter describes the TSS901E registers which can be read or written by the HOCI or via
the link (in case the "control by link" is enabled) to control TSS901E operations. All TSS901E
control operations are performed by writes or reads of the respective registers. Most of the con-
trol operations are obvious from the content of the registers.
General Conventions:
•
•
•
Big/Little endian selection of the HOCI is done using a special pin (HOSTBIGE) of the TSS901E.
By connecting this pin to either Vcc or GND the HOCI is configured to be in little or big endian
mode as follows:
Little endian mode selected:
•
•
•
Big endian mode selected:
•
•
•
The registers of the TSS901E are 1, 2 or 4 Bytes wide. That means, if the HOCI data port is in 8
bit mode, 4 read or write accesses are necessary to access a 4 Byte register (e. g. the interrupt
mask register). In 16/32 bit mode the data bits 31 - 8 are '0' if an 8 bit register is read.
bit 0 (D0) = least significant bit,
bit 7 (D7) = most significant bit (or bit 15 resp. bit 31)
D x:0 means data bit x until bit 0.
When Signal HOSTBIGE = '0' (GND), the HOCI data port is in little endian mode.
When Signal HOSTBIGE = '1' (Vcc), the HOCI data port is in big endian mode.
8 bit data port (default after reset)
–
16 bit data port
–
–
32 bit data port
–
–
–
–
8 bit data port (default after reset)
–
16 bit data port
–
–
32 bit data port
–
–
–
–
register byte 0 is connected with pin HDATA0 - HDATA7
register byte 0 is connected with pin HDATA0 - HDATA7
register byte 1 is connected with pin HDATA8 - HDATA15
register byte 0 is connected with pin HDATA0 - HDATA7
register byte 1 is connected with pin HDATA8 - HDATA15
register byte 2 is connected with pin HDATA16 - HDATA23
register byte 3 is connected with pin HDATA24 - HDATA31
register byte 0 is connected with pin HDATA24 - HDATA31
register byte 0 is connected with pin HDATA24 - HDATA31
register byte 1 is connected with pin HDATA16 - HDATA23
register byte 0 is connected with pin HDATA24 - HDATA31
register byte 1 is connected with pin HDATA16 - HDATA23
register byte 2 is connected with pin HDATA8 - HDATA15
register byte 3 is connected with pin HDATA0 - HDATA7
TSS901E
7