HD404849

Features:

·  35 I/O pins, including nine high-current pins (15 mA, max.), eight pins multiplexed with LCD segment pins, and four pins multiplexed with analog input pins
·  Four timer/counters
·  Eight-bit input capture circuit
·  Three timer outputs (including two PWM outputs)
·  Two event counter inputs (including one in which the detection edge is programmable)
·  Clock-synchronous 8-bit serial interface
·  A/D converter (8 channels ×8 bits) Operation voltage 2.7 V to 6.0 V
·  LCD driver (32 segments×4 commons)
·  Built-in oscillators Main clock: Can be driven by ceramic oscillator, crystal oscillator, or external clock. Subclock: 32.768-kHz crystal
·  Ten interrupt sources Four by external sources, including two in which the detection edge is programmable Six by internal sources
·  Subroutine stack up to 16 levels, including interrupts
·  Four low-power dissipation modes Standby mode Stop mode Watch mode Subactive mode
·  One external input for transition from stop mode to active mode
·  Instruction cycle time: 0.89 ms (fOSC = 4.5 MHz)
·  Operation voltage V_CC = 2.7 V to 6.0 V (subactive mode: 2.2 V to 6.0 V) (HD404848, HD404849) V_CC = 2.7 V to 5.5 V (HD4074849)
·  Two operating modes MCU mode (HD404848, HD4048412, HD404849) MCU/PROM mode (HD4074849 only)

Pinout




Specifications

Item	Symbol	Ratings	Unit	Notes
Supply voltage	VCC	0.3 to +7.0	V
Programming voltage	VPP	0.3 to +14.0	V	1
Pin voltage	VT	0.3 to VCC + 0.3	V
Total permissible input current	Io	100	mA	2
Total permissible output current	-Io	50	mA	3
Maximum input current	Io	4	mA	4,5
		30	mA	4,6
Maximum output current	Io	4	mA	7,8
Operating temperature	Topr	20 to +75	°C
Storage temperature	Tstg	55 to +125	°C

Description

The HD404849 series of HMCS400-series microcomputers is designed to increase program productivity and also incorporate large-capacity memory. Each microcomputer has an LCD controller/driver, A/D converter, input capture circuit, 32-kHz oscillator for clock use, and four low-power dissipation modes.

The HD404849 series includes the HD404848 with an 8-kword on-chip ROM, the HD4048412 with a 12-kword on-chip ROM, the HD404849 with a 16-kword on-chip ROM, and the HD4074849 with a 16-kword on-chip PROM.

On-chip HD404849 ROM is available in a PROM (ZTATä microcomputer) version and a mask ROM version. A program can be written to the PROM by a PROM writer, which can dramatically shorten system development periods and smooth the process from debugging to mass production. PROM programming specifications are the same as for the 27256. ZTA^TM: Zero Turn Around Time ZTAT is a trademark of Hitachi Ltd.