- 您现在的位置：买卖IC网 > PDF目录11819 > SC28L198A1BE,528 (NXP Semiconductors)IC UART OCTAL SOT407-1 PDF资料下载
参数资料
| 型号： | SC28L198A1BE,528 |
| 厂商： | NXP Semiconductors |
| 文件页数： | 21/57页 |
| 文件大小： | 0K |
| 描述： | IC UART OCTAL SOT407-1 |
| 标准包装： | 1,000 |
| 特点： | 故障启动位检测 |
| 通道数： | 8 |
| FIFO's： | 16 字节 |
| 电源电压： | 3.3V，5V |
| 带自动流量控制功能： | 是 |
| 带故障启动位检测功能： | 是 |
| 带调制解调器控制功能： | 是 |
| 带CMOS： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 100-LQFP |
| 供应商设备封装： | 100-LQFP（14x14） |
| 包装： | 带卷 (TR) |
| 其它名称： | 935262731528 SC28L198A1BE-T SC28L198A1BE-T-ND |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页当前第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页
Philips Semiconductors
Product data sheet
SC28L198
Octal UART for 3.3 V and 5 V supply voltage
2006 Aug 10
28
Table 27. ICR – Interrupt Control Register
Bit 7
Bits 6:0
Reserved. Set to 0
Upper seven bits of the Arbitration Threshold
This register provides a single 7 bit field called the interrupt
threshold for use by the interrupt arbiter. The field is interpreted as a
single unsigned integer. The interrupt arbiter will not generate an
external interrupt request, by asserting IRQN, unless the value of
the highest priority interrupt exceeds the value of the interrupt
threshold. If the highest bidder in the interrupt arbitration is lower
than the threshold level set by the ICR, the Current Interrupt
Register, CIR, will contain x’00. Refer to the functional description of
interrupt generation for details on how the various interrupt source
bid values are calculated.
Note: While a watch-dog Timer interrupt is pending, the ICR is not
used and only receiver codes are presented for interrupt arbitration.
This allows receivers with very low count values (perhaps below the
threshold value) to win interrupt arbitration without requiring the user
to explicitly lower the threshold level in the ICR. These bits are the
upper seven (7) bits of the interrupt arbitration system. The lower
three (3) bits represent the channel number.
UCIR – Update CIR
A command based upon a decode of address x’8C. ( UCIR is not a
register!) A write (the write data is not important; a “don’t care”) to
this ’register’ causes the Current Interrupt Register to be updated
with the value that is winning interrupt arbitration. The register
would be used in systems that poll the interrupt status registers
rather than wait for interrupts. Alternatively, the CIR is normally
updated during an Interrupt Acknowledge Bus cycle in interrupt
driven systems.
Table 28. CIR – Current Interrupt Register
Bits 7:6
Bits 5:3
Bits 2:0
Type
Current byte count/type
Channel number
00 – other
000 – no interrupt
001 – Change of State
010 – Address
Recognition
011 – Xon/Xoff status
100 – Not used
101 – Break change
110, 111 do not occur
000 = a
001 = b
010 = c
011 = d
111 = h
01 – Transmit
11– Receive w/
errors
10 – Receive w/o
errors
Current count code
0 => 9 or less
characters
1 => 10 characters
.
5 => 14 characters
6 => 15 characters
7 => 16
(See also GIBCR)
000 = a
001 = b
010 = c
011 = d
111 = h
The Current Interrupt Register is provided to speed up the
specification of the interrupting condition in the Octal UART. The
CIR is updated at the beginning of an interrupt acknowledge bus
cycle or in response to an Update CIR command. (see immediately
above) Although interrupt arbitration continues in the background,
the current interrupt information remains frozen in the CIR until
another IACKN cycle or Update CIR command occurs. The LSBs of
the CIR provide part of the addressing for various Global Interrupt
registers including the GIBCR, GICR, GITR and the Global RxFIFO
and TxFIFO FIFO. The host CPU need not generate individual
addresses for this information since the interrupt context will remain
stable at the fixed addresses of the Global Interrupt registers until
the CIR is updated. For most interrupting sources, the data
available in the CIR alone will be sufficient to set up a service
routine.
The CIR may be processed as follows:
If CIR[7] = 1, then a receiver interrupt is pending and the count is
CIR[5:3], channel is CIR[2:0]
Else If CIR[6] = 1 then a transmitter interrupt is pending and the
count is CIR[5:3], channel is CIR[2:0]
Else the interrupt is another type, specified in CIR[5:3]
Note: The GIBCR, Global Interrupting Byte Count Register, may be
read to determine an exact character count if 9 or less characters
are indicated in the count field of the CIR.
Table 29. IVR – Interrupt Vector Register
Bits 7:0
8 data bits of the Interrupt Vector (IVR)
The IVR contains the byte that will be placed on the data bus during
an IACKN cycle when the GCCR bits (2:1) are set to binary ‘01’.
This is the unmodified form of the interrupt vector.
Table 30. Modification of the IVR
Bits 7:5
Bits 4:3
Bits 2:0
Always contains
bits (7:5) of the IVR
Will be replaced
with current inter-
rupt type if IVC field
of GCCR > 1
Replaced with inter-
rupting channel num-
ber if IVC field of
GCCR > 0
The table above indicates how the IVR may be modified by the
interrupting source. The modification of the IVR as it is presented to
the data bus during an IACK cycle is controlled by the setting of the
bits (2:1) in the GCCR (Global Chip Configuration Register)
Table 31. GICR – Global Interrupting Channel
Register
Bits 7:3
Bits 2:0
Reserved
Channel code
100 = e
000 = a
101 = f
001 = b
110 = g
010 = c
111 = h
011 = d
A register associated with the interrupting channel as defined in the
CIR. It contains the interrupting channel code for all interrupts.
相关PDF资料 |
PDF描述 |
|---|---|
| V24B5H150BL3 | CONVERTER MOD DC/DC 5V 150W |
| V24B5H150BL | CONVERTER MOD DC/DC 5V 150W |
| V24B5H150B3 | CONVERTER MOD DC/DC 5V 150W |
| SCC2692AE1B44,551 | IC UART DUAL W/FIFO 44PLCC |
| SC16C754BIB80,551 | IC UART QUAD 64BYTE 80LQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SC28L198A1BE-S | 功能描述:UART 接口集成电路 3V-5V 8CH UART INTEL/MOT INTRF RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| SC28L198C1A | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Octal UART for 3.3V and 5V supply voltage |
| SC28L201 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:3.3 V, 5 V UART, 3.125 Mbit/s, with 256-byte FIFO |
| SC28L201A1DGG | 功能描述:UART 接口集成电路 3-5V 1CH UART 3MBPS 256B FIFO RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
| SC28L201A1DGG,112 | 功能描述:UART 接口集成电路 3-5V 1CH UART 3MBPS RoHS:否 制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。