MC33780EG Freescale Semiconductor, MC33780EG Datasheet - Page 28

• Manufacturer Part Number: MC33780EG
• Description: IC DBUS MASTER DUAL DIFF 16-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MC33780EG

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

DnH REGISTERS
registers, one for each of the buses, as shown in
When written to, the data is the high byte of a 9- to16-bit
command. When read, it is the high byte of a 9- to 16-bit
return on the DBUS. Writing to this register does not begin a
DBUS transaction. The low byte must be written to initiate the
DBUS transaction.
28
33780
FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
SPI Data Bit
Read / Write
Reset
These are read / write registers. There are two of these
Bit 15
DEN Register
Bit 7
0
DLYn[B:A]
Figure 24. DBUS Master Registers and Interrupt Block Diagram
Bit 14
MSn
6
0
(Read-Only)
DnCTRL Register
Figure 25. DnH Data Register Bit Assignments
Rx FIFOn
DnH Rx DnL Rx
Bit 13
5
0
Figure
DBUS Encode/Decode Logic
Bit 12
24.
4
0
ERn
DnSTAT Register
(Read-Only)
4 Interrupt Sources
word of 8 bits is selected for the DBUS (MSn = 1), this register
is skipped in the SPI burst sequence. When the short word
length is set at other than 8 bits, this register will contain the
bits above eight, starting with the ninth bit in the least
significant bit position of the register. Unused bit positions are
don’t care values.
Bit 11
Tx FIFOn
3
0
TFEn
TIEn
The bit assignments are shown in
(2 shown)
DnH Tx
RFNEn
RIEn
Bit 10
DnL Tx
2
0
(Write-Only)
Analog Integrated Circuit Device Data
Interrupt Request
Bit 9
1
0
Freescale Semiconductor
Figure
Bit 8
0
0
25. When a short