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Download UM10315 LPC315x User manual
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UM10315 NXP Semiconductors Chapter 23: LPC315x LCD interface Table 491. LCD interface Control register (LCD_CONTROL, address 0x1500 404) Bit Symbol Access Reset Description Value 31:21 Reserved - - Reserved 20 BYASYNC_RELCLK R/W 0x0 Bypass the logic which assumes asynchronous relation between PCLK & LCDCLK 19 IF_16 R/W 0x0 Interface to 16 bit LCD-Controller. If set, overrides the IF (bit 3) 18 LOOPBACK R/W 0x0 ‘0’ = Normal Operation ‘1’ = LCD Interface in Loopback mode 17 MSB_FIRST R/W 0x0 8-bit mode: Don't care. 4-bit mode: `0' means that bits 3-0 will be transmitted first. `1' means that bits 7-4 will be transmitted first. Serial mode: `0' means that bit 0 will be transmitted first. `1' means that bit 7 will be transmitted first. 16 INVERT_E_RD R/W 0x0 Intel 8080 mode (MI = 0): ‘0' = E_RD output pin will be active low ‘1' = E_RD output pin will be active high Motorola 6800 mode (MI = 1): ‘0' = E_RD output pin will be active high ‘1' = E_RD output pin will be active low 15 INVERT_CS R/W 0x0 14 BUSY_RS_VALUE R/W 0x0 ‘1' = Chip select output will be active low ‘0' = Chip select output will be active high ‘0' = busy check will happen on RS = '0'. ‘1' = busy check will happen on RS = '1'. Don't care if BUSY_FLAG_CHECK = `0' 13:10 BUSY_BIT_NR R/W 0xF This 4 bit value stores the bit of the 6800/8080 bus which represents the busy flag. Don't care if BUSY_FLAG_CHECK = ‘0' 9 BUSY_VALUE R/W 0x0 ‘0' = if the checked bit equals to ‘0' that the LCD controller is not busy. ‘1’ = if the checked bit equals to `1' that the LCD controller is busy. Don't care if BUSY_FLAG_CHECK = `0' 8 BUSY_FLAG_CHECK R/W 0x0 ‘0' will disable the busy-flag checking ‘1' will enable the busy-flag-checking 7:6 SERIAL_READ_POS R/W 0x3 Parallel mode (PS = 0): Dont care Serial Mode (PS=1): ‘00xx' = Sampling done at the beginning of the cycle ‘01xx' -- Sampling done at 0.25 * cycle ‘10xx' -- Sampling done at 0.5 * cycle ‘11xx' -- Sampling done at 0.75 * cycle See Figure 23–71. UM10315 User manual © NXP B.V. 2012. All rights reserved. Rev. 1 — 8 June 2012 453 of 644
