8741AH, 8742AH Datasheet - Intel

8741AH Universal Peripheral Interface 8-Bit Slave Microcontroller

Symbol DIP Pin No 1 39 PLCC Pin Type No 2 43 I Name and Function TEST 0 TEST 1 TEST INPUTS Input pins which can be directly tested using conditional branch instructions FREQUENCY REFERENCE TEST 1 (T1) also functions as the event timer input (under software control) TEST 0 (T0) is used during PROM .

UPI-41AH 42AH UNIVERSAL PERIPHERAL INTERFACE 8-BIT SLAVE MICROCONTROLLER Y Y UPI-41 6 MHz UPI-42 12 5 MHz Pin Software and Architecturally Compatible with all UPI-41 and UPI-42 Products 8-Bit CPU plus ROM OTP EPROM RAM I O Timer Counter and Clock in a Single Package 2048 x 8 ROM OTP 256 x 8 RAM on UPI-42 1024 x 8 ROM OTP 128 x 8 RAM on UPI-41 8-Bit Timer Counter 18 Programmable I O Pins One 8-Bit Status and Two Data Registers for Asynchronous Slave-toMaster Interface DMA Interrupt or Polled Ope.

8742AH_Intel.pdf