XR16L78464-TQFP EXAR [Exar Corporation], XR16L78464-TQFP Datasheet - Page 19

• Manufacturer Part Number: XR16L78464-TQFP
• Description: HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
• Manufacturer: EXAR [Exar Corporation]

áç
áç
áç
áç
REV. 1.2.0
The XR16L784 quad UART register set consists of the Device Configuration Registers that are accessible
directly from the data bus for programming general operating conditions of the UARTs and monitoring the
status of various functions. These functions include all 4 channel UART’s interrupt control and status, 16-bit
general purpose timer control and status, sleep mode, soft-reset, and device identification and revision. Also,
each UART channel has its own set of internal UART Configuration Registers for its own operation control,
status reporting and data transfer. These registers are mapped into a 256-byte of the data memory address
space. The following paragraphs describe all the registers in detail.
The device configuration registers are directly accessible from the bus. This provides easy programming of
general operating parameters to the 784 UART and for monitoring the status of various functions. The device
configuration registers are mapped onto address 0x80-8F as shown on the register map in Table 8 and
Figure 13. These registers provide global controls and status of all 4 channel UARTs that include interrupt
status, 16-bit general purpose timer control and status, 8X or 16X sampling clock, sleep mode control, soft-
reset control,
.
3.0 XR16L784 REGISTERS
3.1
A
F
DDRESS
IGURE
0x00 - 0x0F
0x10 - 0x1F
0x20 - 0x2F
0x30 - 0x3F
0x40 - 0x7F
0x80 - 0x8F
DEVICE CONFIGURATION REGISTER SET
13. T
[A7:A0]
simultaneous UART initialization
8-bit Data
Interface
HE
Bus
XR16L784 R
Device Configuration Regis-
UART channel 0 Registers
UART channel 1 Registers
UART channel 2 Registers
UART channel 3 Registers
UART C
HANNEL
None
ters
EGISTERS
T
S
ABLE
PACE
INT0, INT1, INT2,
M
SLEEP, RESET
, and device identification and revision.
INT3, TIMER,
Channel 0
Channel 1
Channel 2
Channel 3
APPING
7: XR16L784 R
(Table 11
(Table 11
(Table 11
(Table 11
19
R
HIGH PERFORMANCE 2.97V TO 5.5V QUAD UART
(Table
EFERENCE
0x00-0F
0x10-1F
0x20-2F
0x30-3F
0x80-8F
EGISTER
0x40-7F
(reserved)
& 12)
& 12)
& 12)
& 12)
8)
S
UART[3:0] Configuration Registers
Device Configuration Registers
ETS
Sleep, Reset, DVID, DREV
Exar Enhanced Registers
First 8 registers are 16550 compatible
Reserved
Interrupt registers and global controls
16550 Compatible and
16-bit Timer/Counter,
4 channel Interrupts,
C
784REGS
OMMENT
XR16L784