EZ80F920120MOD Zilog, EZ80F920120MOD Datasheet - Page 128

• Manufacturer Part Number: EZ80F920120MOD
• Description: MODULE EZ80F92 512K 20MHZ
• Manufacturer: Zilog

Specifications of EZ80F920120MOD

• Module/board Type: Development Module
• Processor Series: EZ80F92x
• Core: eZ80
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 1 MB
• Interface Type: Cable
• Maximum Clock Frequency: 20 MHz
• Operating Supply Voltage: 0 V to 3.3 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: LQFP
• Development Tools By Supplier: eZ80F920200ZCOG
• Minimum Operating Temperature: 0 C
• For Use With/related Products: eZ80F92
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3157; EZ80F920120MOD

PS015308-0404
UART Interrupt Identification Register
The Read Only UARTx_IIR register allows the user to check whether the FIFO is enabled
and the status of interrupts. These registers share the same I/O addresses as the
UARTx_FCTL registers. See Tables 58 and 59.
Table 58. UART Interrupt Identification Registers
(UART0_IIR = 00C2h, UART1_IIR = 00D2h)
Table 59. UART Interrupt Status Codes
Bit
Reset
CPU Access
Note: R = Read only.
Bit
Position
[7:6]
FSTS
[5:4]
[3:1]
INSTS
0
INTBIT
INSTS
Value
011
010
110
101
Priority
Highest
Second
Third
Fourth
Value
00
10
11
00
000–
110
0
1
Description
FIFO is disabled.
Receive FIFO is disabled (MULTIDROP mode).
FIFO is enabled.
Reserved.
Interrupt Status Code
The code indicated in these three bits is valid only if INTBIT is
1. If two internal interrupt sources are active and their
respective enable bits are High, only the higher priority
interrupt is seen by the application. The lower-priority interrupt
code is indicated only after the higher-priority interrupt is
serviced.
status codes.
There is an active interrupt source within the UART.
There is not an active interrupt source within the UART.
Interrupt Type
Receiver Line Status
Receiver Data Ready or Trigger Level
Character Time-out
Transmission Complete
P R E L I M I N A R Y
R
7
0
R
6
0
UART Interrupt Status Codes
R
5
0
Universal Asynchronous Receiver/Transmitter
R
4
0
R
3
0
Product Specification
lists the interrupt
R
2
0
eZ80F92/eZ80F93
R
1
0
R
0
1
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