Changhong Electric PT4206 Service Manual page 14

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