LPC1837FET256,551 NXP Semiconductors, LPC1837FET256,551 Datasheet - Page 446

• Manufacturer Part Number: LPC1837FET256,551
• Description: Microcontrollers (MCU) 32BIT ARM CORTEX-M3 MCU 136KB SRAM
• Manufacturer: NXP Semiconductors
• Series: LPC18xxr

Specifications of LPC1837FET256,551

• Core: ARM Cortex M3
• Core Processor: ARM® Cortex-M3™
• Core Size: 32-Bit
• Speed: 150MHz
• Connectivity: CAN, EBI/EMI, Ethernet, I²C, Microwire, SD/MMC, SPI, SSI, SSP, UART/USART, USB OTG
• Peripherals: Brown-out Detect/Reset, DMA, I²S, Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 80
• Program Memory Size: 1MB (1M x 8)
• Program Memory Type: FLASH
• Eeprom Size: -
• Ram Size: 136K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Data Converters: A/D 16x10b; D/A 1x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 256-LBGA
• Lead Free Status / Rohs Status: Details
• Other names: 935293795551

NXP Semiconductors
Table 368. USB Command register in host mode (USBCMD_H - address 0x4000 7140) bit description
<Document ID>
User manual
Bit
15
23:16
31:24
Symbol
FS2
ITC
-
21.6.3 USB Status register (USBSTS)
Value
Table 369. Frame list size values
This register indicates various states of the Host/Device controller and any pending
interrupts. Software sets a bit to zero in this register by writing a one to it.
Remark: This register does not indicate status resulting from a transaction on the serial
bus.
USBCMD bit 15
0
0
0
0
1
1
1
1
Description
Bit 2 of the Frame List Size bits. See
Interrupt threshold control.
The system software uses this field to set the maximum rate at which
the host/device controller will issue interrupts. ITC contains the
maximum interrupt interval measured in micro-frames. Valid values
are shown below. All other values are reserved.
0x0 = Immediate (no threshold)
0x1 = 1 micro frame.
0x2 = 2 micro frames.
0x8 = 8 micro frames.
0x10 = 16 micro frames.
0x20 = 32 micro frames.
0x40 = 64 micro frames.
Reserved
All information provided in this document is subject to legal disclaimers.
USBCMD bit 3
0
0
1
1
0
0
1
1
Rev. 00.13 — 20 July 2011
Chapter 21: LPC18xx USB1 Host/Device controller
USBCMD bit 2
0
1
0
1
0
1
0
1
Table
369.
Frame list size
1024 elements (4096 bytes) - default
value
512 elements (2048 bytes)
256 elements (1024 bytes)
128 elements (512 bytes)
64 elements (256 bytes)
32 elements (128 bytes)
16 elements (64 bytes)
8 elements (32 bytes)
UM10430
© NXP B.V. 2011. All rights reserved.
Reset
value
0
0x8
0
…continued
446 of 1164
Access
-
R/W