參數(shù)資料
型號: CL-PS7111
廠商: Cirrus Logic, Inc.
英文描述: Low-Power System-on-a-Chip
中文描述: 低功耗系統(tǒng)級晶片
文件頁數(shù): 35/105頁
文件大?。?/td> 1207K
代理商: CL-PS7111
PRELIMINARY DATA BOOK v2.0
September 1997
34
FUNCTIONAL DESCRIPTION
CL-PS7111
Low-Power System-on-a-Chip
Figure 3-6. Video Buffer Mapping
The refresh rate is not affected by the number of bits per pixel. However, the LCD controller fetches twice
the data per refresh for 4-bits-per-pixel compared to 2-bits-per-pixel. The main reason for reducing the
number of bits per pixel is to reduce the power consumption of the memory where the video buffer is
mapped.
3.11
Two Internal UARTs and SIR Encoder
The CL-PS7111 contains two built-in UART, UART1 and UART2. Both UARTs support bit rates of up to
115.2 kbps and contain two 16-byte FIFOs for receive and transmit.
UART1 supports the three modem-control input signals: CTS, DSR, and DCD. The additional RI input
modem control line is not supported. Output modem control lines (such as RTS and DTR) are not explic-
itly supported, but can be implemented using bits from the GPIO ports in the CL-PS7111. UART2 has
only receive and transmit pins.
PIXEL 1
PIXEL 2
PIXEL 3
PIXEL 4
GRAYSCALE
GRAYSCALE
GRAYSCALE
GRAYSCALE
GRAYSCALE
GRAYSCALE
2-BITS-PER-PIXEL
4-BITS-PER-PIXE
L
1-BIT-PER-PIXEL
PIXEL 1
PIXEL 2
PIXEL 3
PIXEL 4
PIXEL 1
PIXEL 2
PIXEL 3
PIXEL 4
BIT 0
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 0
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 0
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
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