CL-PS7110-VC-A View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
'CL-PS7110-VC-A' PDF : 82 Pages View PDF
CL-PS7110
Low-Power System-on-a-Chip
3.2.17 INTMR — Interrupt Mask Register
The Interrupt Mask register is a 16-bit read/write register used to selectively enable any of the 16 interrupt
sources within the CL-PS7110. The four shaded (see following table) interrupts all generate a fast inter-
rupt request to the ARM710A microprocessor; this causes a jump to processor virtual address
0000.0001C. All other interrupts generate a standard interrupt request; this causes a jump to processor
virtual address 0000.00018. See Table 1-1 on page 14 for the interrupt allocation. Setting the appropriate
bit in this register enables the corresponding interrupt. All bits are cleared by a system reset.
7
EINT3
15
SSEOTI
6
EINT2
14
UMSINT
5
EINT1
13
URXINT
4
CSINT
12
UTXINT
3
MCINT
11
TINT
2
WEINT
10
RTCMI
1
BLINT
9
TC2OI
0
EXTFIQ
8
TC1OI
3.2.18 LCDCON — LCD Control Register
The LCD Control register is a 32-bit read/write that controls the size of the LCD screen and the operating
mode of the LCD controller operates in. Refer to Section 1.2.10 for more information on video buffer map-
ping and the LCD controller.
31
30
29
25 24
19 18
13 12
0
GSMD GSEN AC prescale Pixel prescale Line length
Video buffer size
Video buffer size
Line length
The video buffer size field is a 13-bit field that sets the total number of bits × 128 (quad
words) in the video display buffer. This is calculated from the formula:
Video buffer size = (Total bits in video buffer / 128) − 1
For example, for a 640 × 240 LCD and 4 bits per pixel the size of the video buffer =
640 × 240 × 4 = 614400 bits
Video buffer size field = (614400 / 128) − 1 = 4799 or 0x12BF h.
The line length field is a 6-bit field that sets the number of pixels in one complete line.
This field is calculated from the formula: Line length = (No. pixels in line / 16) − 1
For example, for 640 × 240 LCD Line length = (640 / 16) − 1 = 39 or 0x27 h.
52
PROGRAMMING INTERFACE
May 1997
DATA BOOK v1.5
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