September 5, 2008 6881076C25-E
3-32 Theory of Operation: ASTRO Spectra VOCON Board
Table 3-6. U204 (MCU)
U204
Pin #
Description To/From
B1 PE0 R260
B2 PE1 B SENSE/LBAT/PWR DWN VR214
C3 PE2 N/C
A3 PE3 EMERG J901-4
D3 PE4 N/C
A2 PE5 N/C
B3 PE6 SPKR COMMON R263
C4 PE7 EXT SPKR R261
B7 4XECLK (7.3726 MHz) U206-A3
J7 PD0 BOOT DATA IN (RXD) J501-17 U206
G6 PD1 BOOT DATA OUT (TXD) J501-18 U208
H6 PD2 MISO J801-7
J6 PD3 MOSI J501-9 J801-8
G5 PD4 SPI SCK J501-8 J801-9
H5 PD5 DA SEL* J501-13
C5 MOD A Q204C
B5 MOD B Q204C
G3 PA0 SCLK U405-C6
U406-C9
J2 PA1 BOOT MODE U405
H3 PA2 HREQ* U405-B10
J3 PA3 SB9600 BUSY J501-20
G4 PA4 IRQA* U406-F10
U405-H10
H4 PA5 BOOTSTRAP* U206-E5
J4 PA6 ECLK SHIFT Q205B
F5 PA7 N/C
E5 RESET/RESET* U201-31
U206-E4
E6 PG7 CSPROG* U206-E3
F8 PG6 CSGEN* U211-1
G8 PG5 CS101* U206-G1
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