Changhong Electric PT4206, Service Manual, Page: 14 / 48

14
116 119
Memory Pin Descriptions
229 MCLK SDRAM clock
223 MCLKFB SDRAM clock feedback
225 MRAS SDRAM row address strobe
226 MCAS SDRAM column address strobe
227 MWE SDRAM write enable
213 210 207 204
203 206 209 211
214 217 215 220
221 218 MA0
MA13 SDRAM address bus
255 252 248 245
242 239 236 232
231 234 238 241
244 247 250 254 MD0
MD15 SDRAM data bus
Host Interface Pin Descriptions
47 2WDAT SDA
45 2WCLK SCL
43 2WA1 Programmable two-wire serial bus address bit 1
44 2WA2 Programmable two-wire serial bus address bit 2
178 179 181 186 MCUD0
MCUD7
MCU data bus
168 170 172
174 176 177
PORTB1 MCU address bus
190 MCUCS Chip select
191 MCUWR MCUR/W signal
192 MCUCMD MCU command signal
188 MCURDY MCU Ready signal
Miscellaneous Pin Descriptions
56 TEST Test mode
144 TESTCLK Used for testing, can be used to supply display clock
55 RESETn Hardware asynchronous reset.
40 XTALI Crystal oscillator input
41 XTALO Crystal oscillator output
146 CGMS CGMS Enable
201 MVE Macrovision write protected enable
62, 63, 194,195 NC
System Power Pin Descriptions
5, 34, 93, 123,140,
175,205, 235
VDD Digital core power (2.5V).
19, 49, 77, 112,
134, 187, 219, 251
VSS Digital core ground.
14, 29, 42, 54, 64,
69, 80, 90, 101,
109, 120, 131, 143,
165, 180, 200, 208,
216, 224, 230, 237,
243, 249, 256
PVDD Digital I/O power (3.3V).
10, 24, 39, 46, 57,
65, 74, 85, 96, 105,
115, 126, 137, 147,
171, 189, 193, 202,
212, 222, 228, 233,
240, 246, 253
PVSS Ground.
60 MPAVDD Memory PLL analog power 2.5V.