參數(shù)資料
型號(hào)： TSB12LV01BPZ
英文描述： FPGA (Field-Programmable Gate Array)
中文描述： 總線控制器
文件頁(yè)數(shù)： 38/106頁(yè)
文件大?。?/td> 605K
代理商： TSB12LV01BPZ
3
–
1
3 Microcontroller Interface
The microcontroller interface allows the local microcontroller/microprocessor to communicate with the
internal control and configuration registers (CFR), asynchronous transfer FIFO (ATF) and general receive
FIFO (GRF). All microcontroller reads/writes are initiated by the microcontroller. The micro interface
supports read transactions from the CFR or GRF, and write transactions to the CFR or ATF.
The micro interface can operate in byte (8 bits) or word (16 bits) accesses. Each CFR, with the exception
of the cycle timer register at 14h and the Phy access register at 24h, can be addressed on byte or word
boundaries. The possible configurations for the interface are shown in Table 3
–
1. The TSB12LV32 can also
be directly connected to the Motorola 68000 and ColdFire
line of MC/MP. Table 3
–
2 defines the mapping
of the micro interface pins between the TSB12LV32, the Motorola 68000 and the ColdFire microprocessor.
Table 3
–
1. Microcontroller Interface Modes of Operation
TSB12LV32 Mode-CONFIGURATION TERMINALS
COLDFIRE
M8BIT_SIZ0
MODE OF OPERATION
MCMODE_SIZ1
0
0
0
16-bit fixed timing mode.
0
0
1
16-bit MCS
–
MCA handshake mode.
0
1
0
8-bit fixed timing mode.
0
1
1
8-bit MCS
–
MCA handshake mode
1
0
0
ColdFire 4-byte (2-word) burst mode
1
0
1
ColdFire 2-byte (1-word) mode
1
1
0
ColdFire 1-byte mode (not supported)
1
1
1
ColdFire 16-byte (8-word) burst mode
Table 3
–
2. TSB12LV32 MP/MC Interface Terminal Function Matrix
TSB12LV32
Motorola 68000/ColdFire MICROCONTROLLER
TERMINAL NAME
USAGE
TERMINAL NAME
USAGE
MA0
–
MA6
Input
A[6:0]
Output
MD0
–
MD15
I/O
D[31:16]
I/O
MCA
Output
TAZ
Input
MCS
Input
TSZ
Output
MWR
Input
R/WZ
Output
MCMODE/SIZ1, M8BIT/SIZ0
Input
SIZ1, SIZ0
Output
TEA
Output
TEAZ
Input
BCLK
Input
SCLK / CLK
Input
The Byte stacker allows the TSB12LV32 to be easily connected to most processors. The byte stacker
consists of a programmable 8-/16-bit data bus and a 7-bit address bus. The TSB12LV32 uses cycle-start
and cycle-acknowledge handshake signals to allow the local bus clock and the 1394 clock to be
asynchronous to one another. The TSB12LV32 is an interrupt driver to reduce cycling. All bus signal labeling
on the TSB12LV32 microcontroller interface use bit #0 to denote the most significant bit (MSB).
ColdFire is a trademark of Motorola, Inc.
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