Texas Instruments 180 to 100 Pin DIMM Adapter TMDSADAP180TO100 TMDSADAP180TO100 데이터 시트
제품 코드
TMDSADAP180TO100
HB8 CONFIG2 REG
EPI CONFIG REG
MODE = HB-8
HP8 CONFIG REG
MODE = NOMUX
MODE = MUXED
MODE = FIFO
CSCFG = 2 CS
CSCFG = ALE + 2 CS
N/A
N/A
NO
NO
8
8
READY
SIGNAL
ADDRESS
RANGE
DATA
SIZE
CSCFG = ALE
CSCFG = 1 CS
CSCFG = 2 CS
CSCFG = ALE + 2 CS
A0 – A19
A0 – A19
A0 – A18
A0 – A17
NO
NO
NO
NO
8
8
8
8
CSCFG = ALE
CSCFG = 1 CS
CSCFG = 2 CS
CSCFG = ALE + 2 CS
A0 – A27
A0 – A27
A0 – A26
A0 – A25
NO
NO
NO
NO
8
8
8
8
SPRS825C – OCTOBER 2012 – REVISED FEBRUARY 2014
7.1.4.3
EPI Host Bus Mode
There are two versions of the EPI Host Bus Mode: an 8-bit version (HB-8) and a 16-bit version (HB-16).
discusses the EPI 8-Bit Host Bus Mode.
discusses the EPI 16-Bit Host
Bus Mode.
7.1.4.3.1 EPI 8-Bit Host Bus (HB-8) Mode
The 8-Bit Host Bus (HB-8) Mode uses fewer data pins than the 16-Bit Host Bus (HB-16) Mode; hence,
more pins are available for address. The HB-8 Mode is also slower than the General-Purpose Mode in
order to accommodate older logic. The HB-8 Mode is selected with the MODE field of EPI Configuration
Register. Within the HB-8 Mode, two additional registers are used to select address/data muxing, chip
selects, and other options. These registers are the HB-8 Configuration Register and the HB-8
Configuration2 Register. See
more pins are available for address. The HB-8 Mode is also slower than the General-Purpose Mode in
order to accommodate older logic. The HB-8 Mode is selected with the MODE field of EPI Configuration
Register. Within the HB-8 Mode, two additional registers are used to select address/data muxing, chip
selects, and other options. These registers are the HB-8 Configuration Register and the HB-8
Configuration2 Register. See
for a snapshot of HB-8 registers, modes, and features.
Figure 7-10. EPI 8-Bit Host Bus Mode
7.1.4.3.1.1 HB-8 Muxed Address/Data Mode
The HB-8 Muxed Mode multiplexes address signals with low-order data signals. For this reason, the
Muxed Mode allows for a larger address space as compared to the Non-Muxed Mode. The HB-8 Muxed
Mode is selected with the MODE field of the HB-8 Configuration Register. In addition to data and address
signals, the HB-8 Muxed Mode also features the ALE signal (indicating to an external latch to capture
address and hold the address until the data phase); RD and WR data strobes; and 1–4 CS (chip select)
signals to enable one of four external peripherals. The ALE and CS options are chosen with the CSCFG
field of the HB-8 Configuration2 Register. For more detailed maps of the HB-8 Muxed Mode, see
Muxed Mode allows for a larger address space as compared to the Non-Muxed Mode. The HB-8 Muxed
Mode is selected with the MODE field of the HB-8 Configuration Register. In addition to data and address
signals, the HB-8 Muxed Mode also features the ALE signal (indicating to an external latch to capture
address and hold the address until the data phase); RD and WR data strobes; and 1–4 CS (chip select)
signals to enable one of four external peripherals. The ALE and CS options are chosen with the CSCFG
field of the HB-8 Configuration2 Register. For more detailed maps of the HB-8 Muxed Mode, see
.
170
Peripheral Information and Timings
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