Epson S1C33 A.4 S5U1C330MxD1 Block Diagram, UPD4724, crystal, 1.843MHz, oscillator, Figure A.4.1 S5U1C330MxD1 block diagram

										APPENDIX S5U1C330MXD1 BOARD
A.4 S5U1C330MxD1 Block Diagram
RS232C connector						S5U1C33xxxD1/target board I/F connector (12 pins)
			VCC						1, 2, 9
(Dsub 9 pins)											VCC
RXD	3		UPD4724		5						RxD (SINx)
	2				4
TXD											TxD (SOUTx)
	7				10
RTS		VCC									SCLK (SCLKx)
CTS	8		1.843MHz	VCC	3						RESET (SW1: ON = L, OFF = H)
DTR	4		crystal			6					NMI (SW2: ON = L, OFF = H)
	6		oscillator				8
DSR											DEBUG (SW3: ON = L, OFF = H)
	5							11, 12
SG											GND

SW1 SW2 SW3 (RESET) (NMI) (DEBUG)

Figure A.4.1 S5U1C330MxD1 block diagram

S1C33 FAMILY DEBUG MONITOR	EPSON	17
OPERATION MANUAL